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    Life Sciences

    The Deep-Sea Podcast

    A couple of deep-sea scientists talk everything deep sea! Interesting facts, recent news, myth-busting and interviews with the most interesting people we know.

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    Copyright: © Copyright 2024 All rights reserved.

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    Latest Episodes:
    020 – Love in the deep sea with Craig Young Feb 05, 2022
    Show notes

    It’s February, the month of love and there’s love in the deep ocean too. We talk reproductive strategies in the deep sea with Professor Craig Young, Dr Autun Purser and Dr Mike Vecchione. How do you find a mate in the sparsely populated deep ocean? How can egg and sperm meet when you are fixed growing on a rock? How can your babies disperse and find a suitable habitat, especially if you live in a rare habitat like a hydrothermal vent? We find the solutions to all these problems and more.

    We also have our regular contributors. Dr Don Walsh shares how a dolphin entourage isn’t a good thing if you’re trying to be a quiet and sneaky sub. Larkin also shares how it’s difficult to keep romance on the DL when you live in the tight confines of a ship, people do love to gossip.

    In recent news, we announce the launch of Alan’s Deep-Sea Research centre but get distracted by the retired yob of a bird, the Kookaburra. We also consider starting a side-hustle selling dirty deep-sea bottled water and discuss a massive icefish nesting ground found in Antarctica.

    We answer Maya’s listener question, ‘are there deep-sea-sons?’ Do they even know it is the month of romance?

    Feel free to get in touch with questions or you own tales from the high seas on:

    podcast@armatusoceanic.com

    We are also on

    Twitter: @ArmatusO

    Facebook: ArmatusOceanic

    Instagram: @armatusoceanic

    Read the show notes and find out more about us at:

    www.armatusoceanic.com

    Glossary

    Abyssal plain – the wide-open spaces of the deep sea, most of the planet

    Filter feeder – animal that feeds by filtering the water e.g., sponge

    Gametes – the reproductive cells, eggs and sperm

    Gonad – the organ that produces the gametes

    Hadal trench – the deep-sea trenches more than 6 km deep

    Hermaphrodite – both male and female simultaneously

    Sessile – animals that cannot move (opposite of mobile)

    Links

    Launch of Minderoo-UWA Deep-Sea Research Centre

    Deep-Ocean bottled water

    First humans to the bottom of the Atacama Trench

    Massive icefish breeding ground paper

    Seasons in the Abyss by Slayer

    Ecosystems of the World – Craig has a great chapter on reproduction in this book

    Paper - Estimating dispersal distance in the deep sea: challenges and applications to marine reserves

    Paper - Reproduction, Larval Biology, and Recruitment of the Deep-Sea Benthos

    Paper - Hadal snailfish reproduction

    Larkin’s YouTube channel My Salty Sea Life

    Credits

    Theme – Hadal Zone Express by Märvel

    Logo image

    Deep-sea Lizardfish, Bathysaurus ferox

    Icefish nests


    019 - We call Mike Vecchione on the squid-phone Jan 08, 2022
    Show notes

    As promised in the Christmas special, we call the ‘squid-phone’ – a special line used by scientists globally when they seem something strange and squiddy. On the other end of that line is Mike Vecchione, the expert on cephalopods. We talk giant and colossal squid (to audible groans from Mike); the bigfin squid (Magnapinna), most famous for being the squid with the long trailing arms that’s often used as an example of terrifying deep-sea creatures, but also a species, genus and Family that Mike described and would love more sightings of.

    In recent news, we worry about deep-ocean circulation and its impact on climate. Reflect on a year of amazing sightings from Monterey Bay Aquarium Research Institute (MBARI) including the giant phantom jelly (Stygiomedusa gigantea) and barreleye fish (Macropinna microstoma).

    We also address a snailfish imposter. The world’s deepest fish, the Mariana snailfish is more often than not represented by an image of a totally different species that happens to have a more attractive headshot. Prema Arasu presents her poem; An Ode to the Blobfish, in honour of another species dominated by one misleading photo.

    Our regular contributors drop by too: Larkin – our resident deckhand tells the tale of an impromptu squid dissection and Don Walsh reflects on piloting the super-deep diving bathyscaphe Trieste in a time when giant squid attack was still a worry.

    An Ode to the Blobfish by Prema Arasu

    O Psychrolutes marcidus! O gelatinous shape!

    Thou art the ravish’d bride of deep-sea trawlers—

    Unassuming foster child of the timeless abyss

    Untimely ripp’d from thy diatomaceous womb

    Fearful fishermen rejoice at thy sacrifice

    An Antipodean altar attended by inchoate priest—

    Then once by man and angels to be seen,

    In roaring thou shall rise and on the surface die.

    Were I anointed and dragged to your Hadal habitus

    Flayed and deconsecrated at thy mucilaginous prow—

    Were I to partake in salt’d communion

    With thou, we would be one and the same.

    Hideousness is a lie, lies hideousness, that is all

    We know on land, and all we need to know.

    Feel free to get in touch with us with questions or you own tales from the high seas on:

    podcast@armatusoceanic.com

    We are also on

    Twitter: @ArmatusO

    Facebook: ArmatusOceanic

    Instagram: @armatusoceanic

    Read the show notes and find out more about us at:

    www.armatusoceanic.com

    Correction

    The Permian-Triassic extinction was not 98% of marine life, 96% of often cited but 81% seems the most accurate current estimate.

    Links

    Check out this fantastic book that Mike co-authored if you would like to learn more about cephalopods

    Larkin’s YouTube channel My Salty Sea Life

    More info about Prema Arasu

    Deep-ocean circulation paper

    The piezothermal effect

    The polar see-saw

    MBARI have had a great year for filming deep-sea critters and have a great best-of reel on YouTube.

    Pink hand fish

    Football fish

    Falkor mural

    Soft robotic snailfish

    Blue Planet II poster

    Nautilus Magazine

    Alan's interview

    Global assessment of hadal fishes – our big paper

    Abyssobrotula galatheae – previous deepest fish from a single report

    Bony-eared assfish

    Top 5% of podcasts

    Lonesome marine biologist Nando

    Recent bigfin squid video

    Zappa jellyfish

    Observational articles: a tool to reconstruct ecological history based on chronicling unusual events by Ferdinando "Nando" Boero

    Deepest squid paper

    Deepest octopi paper

    The Pteropods – swimming snails

    Oegopsida or Oceanic squids, the true squid

    Myopsids or coastal squids, could be considered true squid

    Sepiolida the Bobtail squids

    Vampyroteuthis infernalis the vampire squid, more closely related to octopods

    Magnapinna sp. The bigfin squid, a charismatic and recently discovered family (the one's that creep everyone out!)

    My Octopus Teacher on Netflix

    Ramshorn squid (Spirula)

    The Serpent Project

    Credits

    Theme – Hadal Zone Express by Märvel

    Logo image

    The Atacama snailfish which is often published as the Mariana snailfish

    The long-arm squid filmed by DSV Alvin, possibly an adult Magnapinna sp. Public Domain NOAA


    Christmas Special 2 – We interview each other Dec 04, 2021
    Show notes

    We like to let our hair down a little for the Christmas episode and do something a little different. We recorded video this episode! You can find the video version of this podcast on our YouTube page. Me and Alan crack out some mulled wine and decide to interview each other for this episode. Things get a little off the topic of deep sea but it’s all in good fun (if a little dark at times).

    We won’t leave you totally without some deep-sea updates though. We still have our news section which includes new research into how sponges may be able to think, a deep-sea crawler that has been tirelessly surveying Station-M for seven years, a new species of deep-diving beaked whale, a new and really nice video of the creepy bigfin squid, can rockfish help us live longer and it turns out that Terry the fat shark is real.

    No episode would be complete without checking in with Don Walsh, who tells a story of a Christmas in the Western Antarctic… the far side, and Larkin who has her Christmas plans suddenly change while trying to leave her ship in Mexico.

    Whatever you celebrate at this time of year, we hope you have a wonderful time. See you all again in the new year.

    Feel free to get in touch with us with questions or you own tales from the high seas on:

    podcast@armatusoceanic.com

    We are also on

    Twitter: @ArmatusO

    https://twitter.com/ArmatusO

    Facebook: ArmatusOceanic

    https://www.facebook.com/ArmatusOceanic

    Instagram: @armatusoceanic

    https://www.instagram.com/armatusoceanic/

    Read the show notes and find out more about us at:

    www.armatusoceanic.com

    Glossary

    Box core: A large sediment sampling device that takes one huge sample

    Grimpoteuthis: the dumbo octopuses

    Hadal: Deeper than 6000 m

    Holotype: a single specimen expressly designated as the name-bearing “type”

    Lander: a freefalling vehicle which sinks to the seabed and returns to the surface by dropping ballast

    MBARI: Monterey Bay Aquarium Research Institute

    Multi core: A large sediment sampling device that takes multiple smaller samples

    Paratype: A specimen cited along with the type collection in the original description of a taxon

    ROV: Remotely Operated Vehicle

    Sunk Cost Fallacy: Sticking with a bad idea because you have already invested so much in it.

    Links

    Sponge neurons

    Benthic Rover II

    New beaked whale

    Paper

    New bigfin squid video

    Chunky shark

    Deep-sea rockfish longevity

    Paper

    Mammoth tusk

    Garfield phone beach

    Ray Troll

    Paleo Nerds Podcast

    Burial at sea

    Iron Maiden - Live After Death

    Larkin’s YouTube channel My Salty Sea Life

    Credits

    Theme – Hadal Zone Express by Märvel

    Sound effects from the BBC archive

    Logo image

    Terry the fat shark

    Our countdown timer at sea


    018 – Sound in the deep ocean with David Barclay Nov 06, 2021
    Show notes

    https://www.armatusoceanic.com/podcast/018-sound

    We think of the deep sea as an eerily quiet and spooky place but that isn’t completely true, animal communication, seismic activity, human noise and even the sound of rain and waves from 10 km above. We chat with undersea audio expert Dr David Barclay about the fascinating audio properties of the deep ocean. As we are talking audio data on an audio medium, lets have some fun with a game of ‘what can we grenad-hear’ where Thom tries to guess the deep-sea sound.

    We also have deep-sea news: India are developing their own 6 km rated human occupied vehicle (Samudrayaan); genetics links deep-sea shrimp with their planktonic juvenile stages; the HACON project explores the Aurora black smoker field at 4000 m/13,000 ft under the Arctic; we also reveal that a mysterious squid-like creature, was, in fact, a squid.

    We also discuss communication (through the medium of famous quotes). Are we losing the ability to actually engage and learn things from each other? Are we all just yelling at each other online from our respective teams? Not willing to really listen to the other side but rather ‘own them’ and drop the mic. In a pandemic of misinformation where a catchy meme can ruin, or even end, peoples lives do we have a duty to try to engage with people? What about the tole that takes on our own mental health?

    Don Walsh drops by with some amazing stories from his sub commander days. A life entirely dependent on listening and being quiet. We then have a ‘tale from the high seas’ from Larkin to finish things up.

    Feel free to get in touch with us with questions or you own tales from the high seas on:

    podcast@armatusoceanic.com

    We are also on

    Twitter: @ArmatusO

    https://twitter.com/ArmatusO

    Facebook: ArmatusOceanic

    https://www.facebook.com/ArmatusOceanic

    Instagram: @armatusoceanic

    https://www.instagram.com/armatusoceanic/

    Read the show notes and find out more about us at:

    www.armatusoceanic.com

    Glossary

    CTD: Conductivity, temperature and depth sensor

    Gametes: sex or germ cells. Eggs and sperm

    Grenadier: another name for a rattail fish

    Hydrothermal vent: seawater heated by the earth flows out of the seabed

    Lander: Free-falling or pop-up vehicle. Sinks from the surface and comes up again by dropping ballast

    Refraction: the change in direction of a wave passing from one medium to another

    Sound channel: Also called the SOFAR channel, a horizontal layer of water in the ocean at which depth the speed of sound is at its minimum

    Links

    Alan’s new hadal centre:

    https://www.minderoo.org/deep-sea-research/

    India’s deep sub:

    https://www.wionews.com/india-news/samudrayaan-indias-first-manned-deep-sea-probe-to-travel-6-km-under-water-425414

    Matching deep-sea shrimp with their pelagic larva:

    https://www.mdpi.com/1424-2818/13/10/457/htm

    Giant squid like creature:

    https://www.timesnownews.com/the-buzz/article/viral-news-massive-squid-like-creature-larger-than-human-spotted-by-scientists-while-exploring-red-sea/822261

    COP26 – Deep Sea World:

    https://youtu.be/0oSpk1eSWMs

    HACON project:

    https://mashable.com/article/deep-sea-science-arctic

    Forbes’ azotic theory:

    https://en.wikipedia.org/wiki/Azoic_hypothesis

    David’s other podcast: Sciographie:

    https://www.dal.ca/news/2020/09/11/scientists-tell-their-own-stories-on-third-season-of-sciographie.html

    David’s research website:

    https://noise.phys.ocean.dal.ca/deepoceannoise.html

    Implosion in the Challenger Deep paper:

    https://tos.org/oceanography/assets/docs/34-2_loranger.pdf

    Underwater noise during COVID-19:

    https://asa.scitation.org/doi/full/10.1121/10.0001271

    KM3Net: hunting for neutrinos in the deep sea:

    https://www.km3net.org/

    Credits

    Theme – Hadal Zone Express by Märvel

    Logo image

    David's lander in action


    017 – Going to sea with Larkin Oct 02, 2021
    Show notes

    https://www.armatusoceanic.com/podcast/017-going-to-sea

    We love going to sea, it is probably the best part of the job. That’s where most of our adventures happen, that’s where most of the exciting discoveries and firsts happen and it’s where we meet some of the most interesting people. We want you to have a great time at sea too and not be put off by a bad first experience. Poor packing or a faux pas could spoil the whole experience and we don’t want that. We put together some advice for your first trip. Forgive us if parts seem patronising, they are all things we have seen spoil someone’s trip and with everything else to worry about, it’s easy to forget the simple stuff.

    We chat with Larkin, a deck-hand turned youtuber about life at sea and sharing that experience through her videos. What is her average day like at sea and how’s the morning commute when your office is a small response vessel chasing a submarine 10,000 m below you? How can you get a celebratory tattoo offshore from an unqualified scientist? “Don’t worry, he’s a doctor, not that sort of doctor but don’t worry about that!”

    Larkin represents the growing proportion of women at sea, a situation which has rapidly changed over the last few years. Did you know that there was a time when she would have been considered bad luck? Don Walsh tells us about the gradual changes to offshore culture that has allowed this and the female pioneers who blazed that trail for the current generation. There is still much to do, but things are accelerating.

    Finally, we hear from listeners what their tips are for your first trip offshore.

    Feel free to get in touch with us with questions or you own tales from the high seas on:

    podcast@armatusoceanic.com

    We are also on

    Twitter: @ArmatusO

    Facebook: ArmatusOceanic

    Instagram: @armatusoceanic

    Read the show notes and find out more about us at:

    www.armatusoceanic.com

    Glossary

    AB – Able Bodied seamen or deck hands

    A-frame – type of lifting equipment, usually at the stern

    Aft – towards the front of the boat

    Bow – the front of the boat

    Bridge – Usually at the top of the boat, where it is steered from

    Bulkhead – the thick metal internal walls of a boat

    Cabin – where you sleep offshore

    Deck – the floors on a boat

    Fore – towards the front of the boat

    Head – the toilet

    Mates – Officers under the captain (1st and 2nd mate)

    Mess – the dining hall on a boat

    Port – left side of the boat (regardless of which way you are facing), colour coded red

    Rigger boots – steel toe capped safety shoes

    Starboard - right side of the boat (regardless of which way you are facing), colour coded green

    Zodiac – a small and fast inflatable boat

    Links

    Vote for a moratorium on deep-sea mining

    Pig-faced shark found in Mediterranean Sea

    More info on Oxynotus centrina (Linnaeus, 1758)

    Big-eye grenadier on Reddit

    Not too sure about the identification as the pic is quite distorted. Here’s info in the bigeye grenadier

    My Salty Sea Life

    Website

    Instagram

    YouTube

    Facebook

    Larkin’s ‘a day in the life of a sailor’ video. Great prep for your first time at sea.

    Larkin’s morning commute

    (a keen eye may spot Alan pottering about in the background)

    Credits

    Theme – Hadal Zone Express by Märvel

    Offshore advice sound clips

    Nikki – lecturer of marine biology

    Andy - marine biologist

    Nic – marine surveyor

    James – marine geotechnical engineer

    Giuseppe – marine scientists, EuroMarine early career scientist group OYSTER

    Natalia – marine scientist, OYSTER communications manager

    Logo image

    The symbol of Hades

    Alan giving Larkin the tattoo

    Hidden track

    Additional sound effects from https://www.zapsplat.com

    BBC sound archive


    016 – Biodiscovery/Bioprospecting with Marcel Jaspars Sep 03, 2021
    Show notes

    https://www.armatusoceanic.com/podcast/016-biodiscovery

    We are in desperate need for new bioactive compounds. Superbugs are on the rise as evolution finds a way of thwarting our antibiotics. We are also continually on the hunt for compounds that can fight disease, ease suffering or get your teeth super white. The natural world has been experimenting for millions of years and has come up with solutions far more elegant than we could come up with.

    Don pops by to make us aware of bioprospecting. The ocean, and in particular the deep ocean, may be the best place to look for new compounds but is this a threat to the ocean? It is often mentioned alongside seabed trawling, climate change and mining as a threat to the deep ocean. Should we call it bioprospecting or biodiscovery and what’s the difference? If most of the world’s ocean belongs to everyone, who owns a discovery? How do we ensure that developed nations, who are better equipped to benefit from a discovery, don’t leave developing nations out? Are companies really patenting naturally occurring compounds? If we find something exciting, what is the process for it becoming the next wonder drug?

    While they both agree that looking for new compounds in the deep sea sounds good, Alan and Thom are soon stumped by the complexities of actually making that happen in a fair and sustainable way. Luckily, they can call on Professor Marcel Jaspars, head of the Marine Biodiscovery Centre to help us through the practicalities of biodiscovery but also its political and ethical complexities.

    As ever there will be a roundup of current news. The sex-lives of giant squid, are they monogamous? India launches its Deep Ocean Mission with the intention of starting deep-sea mining and we ponder why large surface predators would dive very deep.

    Feel free to get in touch with us with questions or you own tales from the high seas on:

    podcast@armatusoceanic.com

    We are also on

    Twitter: @ArmatusO

    Facebook: ArmatusOceanic

    Instagram: @armatusoceanic

    Read the show notes and find out more about us at:

    www.armatusoceanic.com

    Glossary

    Benthopelagic - Living and feeding near the bottom as well as in midwaters or near the surface but also the depth zone about 100 metres off the bottom at all depths below the edge of the continental shelf.

    Endothermy – Animals that regulate their body temperature (we used to call this ‘warm blooded’)

    Geomagnetic – The Earth’s magnetic field e.g., magnetic north.

    Mantle – The muscular tube that makes up a squids body.

    Mesopelagic – Open water fish between about 200 and 1,000 metres (approximately 650 and 3,300 ft) down.

    SoFAR channel - sound fixing and ranging channel. The SOFAR channel acts as a waveguide for sound, and low frequency sound waves within the channel may travel thousands of miles before dissipating.

    Vertical migration – Every night, mesopelagic fish come shallower to feed. This is the largest migration on Earth and it happens every day.

    Links

    Giant squid could be monogamous

    Article:

    Paper (paywall):

    Bone and wood eating worms of the Antarctic

    India’s Deep-Ocean Mission approved

    Deep diving large marine predators

    Are whales making these depressions in the deep seabed?

    Take two clams and call me in the morning (paywall)

    United Nations Convention on the Law of the Sea

    The Convention on Biological Diversity

    The Nagoya Protocol

    The Deepest of Ironies (paywall)

    Evolving Perspectives On The International Seabed Area’s Genetic Resources: Fifteen Years After The ‘Deepest Of Ironies’ (paywall)

    Who owns marine biodiversity? Contesting the world order through the ‘common heritage of humankind’ principle

    Corporate control and global governance of marine genetic resources

    Polymers: Secrets from the deep sea

    Ocean Biodiversity Information System (OBIS)

    Ocean Tool for Public Understanding and Science (OcToPUS)

    Deep sea at the Chelsea Flower Show

    Song of the Ocean – Global Virtual Performance 2021

    Sharing the Benefits of the Ocean (loads of wider reading here)

    Credits

    Theme – Hadal Zone Express by Märvel

    Logo image

    Far Below the Sea Blooms – Chelsea Flower Show, Marcel Jaspars

    One of Thom and Alan’s cultures

    Hidden track

    Someone To Watch Over Me

    by Ira and George Gershwin; Linda Keene; Henry Levine and his Strictly from Dixie Jazz Band

    Humpback Whale (Megaptera Novaeangliae) – BBC sound archive


    015 - Space pt2 - Design and management of extreme tech with Evan Hilgemann Aug 23, 2021
    Show notes

    https://www.armatusoceanic.com/podcast/015-space-pt2

    We hunker down behind the blast doors and quickly record part 2 of our space episode before 426 manages to get through. That’ll make more sense once you hear the episode, or maybe it won’t! I may have gotten carried away on the sound design on this one.

    We are still exploring the parallels between space and deep-ocean exploration. It feels like technology and access is really accelerating in both spheres. Don calls in to teach us about the amount of water in our solar system and the potential new job title – Planetary Oceanographer.

    When an incredible piece of tech grants us access to an exciting new frontier, it can be hard to manage all the different things we would like to do. Alan relays how, on his expeditions, data is first shared with the host nations and then access is requested.

    When samples or access to a vehicle is limited, how can we ensure that resources are shared fairly? We have seen it lead to disagreements on ships. With something as singular and precious as a Mars rover, how are its objectives planned? Evan Hilgemann, mechanical engineer and Curiosity Rover driver with NASA’s Jet Propulsion Lab (JLP) joins us to share how a rover is managed. We chat about the parallels between exploring mars and exploring the deep sea, the similar issues we face, what we can learn from each other and most excitingly, where is technology heading on both fronts! It turns out fleets of distributed intelligence rovers on the moon or a steam-punk rover on Venus aren’t all that farfetched. These are exciting times.

    Feel free to get in touch with questions or you own tales from the high seas on:

    podcast@armatusoceanic.com

    We are also on

    Twitter: @ArmatusO

    Facebook: ArmatusOceanic

    Instagram: @armatusoceanic

    Read the show notes and find out more about us at:

    www.armatusoceanic.com

    Glossary

    Autonomous - Something which can get on with things without human control

    AUV - Autonomous Underwater Vehicle

    Distributed intelligence – a very fuzzy term but basically multiple ‘stupid’ elements working together to do complex processing or make complex decisions.

    Hadal - Areas more than 6000 m deep, mainly the deep-ocean trenches

    JPL - NASA Jet Propulsion Laboratory

    ROV - Remotely Operated Vehicle

    Transect - A quantitative survey of an area. You fly a set path and quantify everything on it.

    Links

    Evan’s Twitter: @evanhilgemann

    Evan’s Newsletter

    Steampunk rover article

    Steampunk rover video

    Credits

    Theme – Hadal Zone Express by Märvel

    Logo image

    Curiosity rover – NASA

    World's Largest Ball of Twine, Darwin, Minnesota - postcard


    014 - Space pt1 - The deep sea of other worlds with Kevin Hand and Casey Machado Aug 12, 2021
    Show notes

    Sorry for the lateness of the episode, we were rather ambitious with this one. Thom and Alan get access to a sound stage and get to actually record the podcast in the same room for the first time. In recent news there seems to be some pop-culture discoveries, the Eye of Sauron and Spongebob and Patrick have been found in the deep sea. Finally, we try not to get too depressed about ocean warming and deep-sea mining buy considering our own energy budgets.

    The topic for this double episode is, as ever, the deep sea. But this time we are talking about the deep sea… Innnnnn Spaaaaaaaace! It turns out there is deep sea outside of earth, even in our solar system. The ice-covered moons of the gas giants likely contain liquid water. How likely are they to contain deep-sea life completely independent from the life that originated on earth? What are the best candidates for alien life in our solar system? What could that life be like and why does our own deep ocean provide a perfect test bed? Thom chats with astrobiologist Kevin Peter Hand, author of Alien Oceans: The search for life in the depths of space, and director of NASA’s Ocean Worlds Lab.

    How will we explore these alien deep seas? It turns out that the early versions of the vehicles which may some day explore these ocean worlds are already in development. Thom chats with Casey Machado, Research Engineer at Woods Hole Oceanographic Institution about the Orpheus AUV, the first generation of such vehicle and a new asset for the exploration of our own deep ocean.

    It turns out space is big, too big for a single podcast. Look out for episode 2 next week.

    Feel free to get in touch with us with questions or you own tales from the high seas on:

    podcast@armatusoceanic.com

    We are also on

    Twitter: @ArmatusO

    Facebook: ArmatusOceanic

    Instagram: @armatusoceanic

    Read the show notes and find out more about us at:

    www.armatusoceanic.com

    Glossary

    Astronomical unit - the distance between the Earth and the Sun

    AUV: Autonomous Underwater Vehicle

    Hadal - Areas more than 6000 m deep, mainly the deep-ocean trenches

    K strategist - an organism that has few offspring but invests a lot of resources and energy into them, e.g. whale

    Molar concentration - one mole (6.02214076×1023 particles) of substance in a litre of solution.

    R strategist - an organism that has many 'cheap' offspring, e.g. salmon

    ROV – Remotely Operated Vehicle

    Links

    Undersea volcano looks like the Eye of Sauron

    Spongebob and Patrick at almost 2000 m

    Temperature impact on deep-sea biodiversity

    Sign up for the DOSI newsletter

    The Ocean Worlds Lab

    The buoyant rover for under ice exploration

    Alien Oceans: The Search for Life in the Depths of Space

    The very bad day, the loss of Nereus

    WHOI Hadex website

    Orpheus


    013 - Submarine Special Jul 02, 2021
    Show notes

    https://www.armatusoceanic.com/podcast/013-submarine-special

    Thom thought he had the podcast to himself, but it turns out the professor is back after 88 days at sea. It’s time for our submarine, or human occupied vehicle (HOV) if you’re posh, special. First we reunite ‘Vegemite and Haggis’ and talk to submarine pilot Tim Macdonald about his and Alan’s undersea adventures around Australia. Manganese nodule fields, gothic cathedrals, and an undersea UFO.

    Life starts to imitate art. We chat with sci-fi author John Quentin who Alan has been consulting with while he writes his next book: The Galathea Legacy, about deep-ocean plastic pollution taking place at the site of the Galathea Expedition trawls in the Philippine Trench. A site which Alan and Tim recently dived… forcing John to tweak the draft as he strives for realism.

    We then speak with Patrick Lahey and Frank Lombardo of Triton Submarines, a bespoke submarine manufacturer, about privately owned submersibles. Initially as luxury pleasure craft but we soon find out that there is a wide range of reasons why someone would want their own sub. Throughout their careers they have had many incredible experiences, like seeing a sixgill shark give birth and communicating with bioluminescent organisms.

    The podcast wouldn’t be complete without checking in with Don Walsh. He tells us about the large commercial tourist submarines which have now produced more tourist submariners than the US navy.

    It’s a packed episode but we sneak some news in there too. Deep-sea fishes have more variation in body shape than shallow-water fishes. A new species, genus, and family of brittle star from a lineage dating back to the Jurassic. Coelacanth can live up to a century and Mesobot, a new method for studying open water animals.

    Glossary

    Autonomous vehicle: A vehicle that doesn’t need a human pilot

    Brittle star: Related to sea stars, they have very flexible whip-like arms. Echinoderms of the class Ophiuroidea

    Globular: Globe-like, spherical

    Human Occupied Vehicle (HOV): Another term for a submarine

    Hypoxic: Insufficient oxygen

    Thrusters: the propellers on an underwater vehicle that allow it to move

    Links

    Deep-sea fish have a lot more body shape variation than shallow fish

    Deep-sea fish are confused by complex structures

    New family of brittle star

    Coelacanth can live to a century

    John’s upcoming book The Galathea Legacy

    Triton submersibles

    Atlantis tourist subs

    The hidden track is real, Thom did say ‘anus’ on TV. You can see us and a lot of our guests, and experience the Five Deeps Expedition, in Expedition Deep Ocean on Discovery+


    012 - Natural history collections with James Maclaine and Andrew Stewart Jun 05, 2021
    Show notes

    Natural history collections, huge archives of carefully curated specimens, are an invaluable tool for the scientific community. They are also a place where the public get to interact with active research and meet scientists. Forget what you’d imagine working in a museum to be like, no two days are the same and both the collections and the talented people who work with them are in constant demand. One day your helping design new swimwear based on shark skin, the next settling an argument at a fishing competition.

    If you’re wondering what jobs are out there in science or just curious to know what goes on behind the scenes at a museum, this episode has some surprises for you.

    Alan is still away at sea, so Thom is joined again by Dr Heather Ritchie to tacked some deep-sea news, seabed mapping, secrets revealed by snailfish genes and wandering sponges are all hot off the presses. Don also drops in with an example of when you don’t want to collect biology, on the hull of your vessel as biofouling.

    Feel free to get in touch with us with questions or you own tales from the high seas on:

    podcast@armatusoceanic.com

    Read the show notes and find out more about us at:

    www.armatusoceanic.com

    Links

    𝐸𝑢𝑟𝑦𝑡ℎ𝑒𝑛𝑒𝑠 𝑎𝑡𝑎𝑐𝑎𝑚𝑒𝑛𝑠𝑖𝑠 description

    Bathymetry from The Five Deeps Published

    The Yap Trench snailfish

    Wandering sponges

    James taking care of the beetles during lockdown

    Microplastics in deep-sea fish

    James talking about deep-sea fish.

    CT scanning reveals anglerfish meal

    Shark nostril research

    Cookie-cutter shark bites

    Museum of New Zealand Te Papa Tongarewa – deep sea video

    The Fishes of New Zealand

    Glossary

    Authority – The scientist who describes a species

    Snailfish – Members of the Liparidae, the deepest living fishes

    TMAO - Trimethylamine N-oxide, a molecule that is involved in pressure adaptation

    Taxonomy – The science of classifying living things

    Type – A specimen that is formally associated with the scientific name

    Holotype – The singular definitive example of a species

    CT scanning – Computerised Tomography Scanning. Basically, a 3D x-ray

    Sequence – A part of the genetic code that we can compare between samples

    Isotopes – When atoms of the same element vary in their mass

    Otolith – The ear bones of fishes


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