big deep - an ocean podcast by Host Jason Elias

Last Updated: June 27, 2026

Scuba Diving, Freediving, Surfing, Ocean Environmentalism, Marine Science. Big Deep is about people who have a deep connection to our world’s oceans, connections strong enough that they have dedicated some part of their lives to being in or working on behalf of the water. In each episode, we speak with the most interesting people, from scuba diving crime fighters and record-breaking freedivers to marine biologists and ocean advocates - even a real-life mermaid. So we invite you to join us on this journey as we explore the ocean through the stories of people who love it. 

The Underworld: Deep Ocean Author Susan Casey On Why It Is Vital For Humanity To Look Even Deeper
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In today's episode, I speak with Susan Casey, New York Times bestselling author and journalist, whose work focuses primarily on the intersection of human beings and the ocean.

Floating In A Galaxy Of Stars: Pier Nirandara on Swimming With Sharks In Hollywood And Drifting With Sardines Off South Africa
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In today's episode, I speak with award-winning author, film producer, and underwater photographer Pier Nirandara.

Gesture of a Lifetime: Manatee Researcher Jamal Galves On How Before He Started Saving Manatees They Saved Him
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The Clean-Up Kid: 13 Year-Old Ocean Conservationist Cash Daniels On How Kids Are The Future Of Ocean Advocacy
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In today's episode, I speak with Cash Daniels, an ocean and river conservationist, Time Magazine honorary finalist as "Kid of the Year," and co-founder of the ocean activism and conservation nonprofit called The Cleanup Kids.

A World Beneath Galapagos: Dr Alex Hearn on Hammerhead Sharks, Where Meaning Lies in the Sea, and a Hidden Underwater Swimway Through the Pacific
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In today's episode, I speak with Dr. Alex Hearn, a marine ecologist at the Universidad de San Francisco in Quito, Ecuador.

A Deep Sense of Presence: Kinga Philipps on her Spiritual Connection to the Sea and Passion for Freediving
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In today's episode, I speak with explorer, ocean activist, and television journalist, Kinga Philipps.

Telling the Stories of the Sea: Dr Maddy McAllister on the Wonder of Shipwrecks and Maritime Archaeology
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In today's episode, I speak with Dr. Madeline McAllister, senior Curator of Maritime Archaeology at the Queensland Museum and James Cook University in Townsville, Australia.

Giants From The Deep: World Champion Big Wave Surfer Maya Gabeira and the Challenge of Riding Mountains of the Sea
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In today's episode, I speak with Brazilian big wave surfer Maya Gabeira, one of the most famous female surfers in the world.

Finally Coming Home: Wild Ocean Forager Roushanna Gray's Journey Through South African Tidepools
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In today's episode, I speak with South African edible ocean and landscape forager Roushanna Gray.

Living At The Edge of the Unknown: Deep Coral Reef Pioneer Dr. Richard Pyle on A Life of Exploration
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In today's episode, I speak with explorer, renowned ichthyologist and deep coral reef pioneer, Richard Pyle. Richard's life story has been one of adventure and exploration, particularly a fascination with deep coral reefs far below where most recreational divers dive.

Where The Story Ends - Maritime archaeologist Jim Delgado on the magic of stories revealed, what shipwrecks can tell us, and his time exploring Titanic
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In today's episode, I speak with maritime archeologist, historian, author, television host, and explorer Jim Delgado. Jim's work has taken him around the globe, and he has known is one of the world's foremost experts in underwater archeology. And his CV reads almost like the greatest history of that field.

Under A Billion Stars - Legendary freediver Mehgan Heaney-Grier on creating records and breaking boundaries for American freediving
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In this episode,  iconic freediver Mehgan Heaney-Grier. Mehgan's life story is wildly eclectic and has elements that originally attracted me, particularly its sense of rugged individualism and carving your own path.

Just Over The Horizon - Explorer, adventurer, and NOAA scientist Dr. Steve Gittings on a life spent chasing adventures under the seas
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In this episode, I speak with Dr. Steve Gittings, chief science officer for NOAA Office of National Marine Sanctuaries. In addition to overseeing science at all 14 United States Marine sanctuaries, and being on numerous boards for ocean environmental organizations, he lives one of the most eclectic lives I know.

The Wild Place - Underwater cinematographer Doug Anderson on how the ocean has defined his life on films such as "Our Planet", "Frozen Planet", and "Life"
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In today's episode, I speak with Doug Anderson, considered to be one of the world's best underwater cameramen.

Comfortable with the Uncomfortable - Sarah Richard, Girls That Scuba founder, on the challenges and joy that a life of passion brings
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In today's episode, I speak with Sarah Richard founder of the world's largest community for female divers, Girls That Scuba, and the ancillary Girls That Free Dive.

A Being of Wonder - Ocean and Science Journalist Erik Olsen on a life driven by exploration, curiosity, and otherworldly cephalopods in the Lembeh Strait
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In today's episode, I speak with journalist and filmmaker Erik Olsen.  Erik’s video journalism has taken him around the world, but his passion most always lies underwater in our world's oceans. His career has spanned ABC News, The Atlantic, Popular Science, and The New York Times.

Chasing A Mirage - Pro surfer and journalist Jamie Brisick on finding meaning in a life amongst the waves
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In today's episode, I speak with former pro surfer, surf journalist, and Fullbright scholar Jamie Brisick.

Breaking The Surface - Shark researcher Jasmine Graham on the surprisingly deep connections which attracted her to sharks
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In this episode, I speak with Marine Biologist and Co-Founder of Minorities in Shark Science, Jasmine Graham.

Passage to the Underworld - Adventurer and Journalist Michael Menduno on a life of exploration and an underwater swim beneath a temple
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Today I speak with Michael Menduno, one of the most accomplished ocean technology and dive reporters for the past 30 years. 

Some Kind of Magic: Alexandra Cousteau on how a deep sense of wonder drives her activism:
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In this episode, I speak with journalist, filmmaker,  and ocean activist Alexandra Cousteau. Alexandra has a long legacy of working to protect our world's oceans and is the founder of Oceans 2050.

Legacy Of The Sea - National Geographic photographer and co-founder of SeaLegacy Cristina Mittermeier on the meaning in telling ocean stories
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In today's episode, I speak with National Geographic Photographer and marine scientist, Cristina Mittermeier.  

Uncovering the Outlaw Ocean: Ian Urbina, Pulitzer Prize winning author, on how the open oceans shape human beings
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In today's episode, I speak with New York Times Pulitzer Prize-winning journalist Ian Urbina. Ian’s investigate journalism about the intersection of the human species and the lawless frontier of the open ocean, most often appears in the new york times, but he frequently writes for the Atlantic and the New Yorker, and culminated in his Times bestseller, “The Outlaw Ocean."

The Wonder of a Blue Planet: Hugh Pearson on filming iconic scenes from the oceans of our world
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In this episode, I speak with Hugh Pearson, the underwater filmmaker behind some of the most iconic ocean sequences ever captured, and director of portions of "Blue Planet," and more recently, both underwater episodes for Netflix's "Our Planet."

Survival of the Strangest: Mikki McComb-Kobza On Her Passion For The Undersea World of Hammerheads
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In this episode, I speak with Dr. Mikki McComb-Kobza, Executive Director of the Ocean First Institute, an organization dedicated to preserving the world's oceans, and a woman with a deep passion for sharks and particularly hammerheads.

A Life Complete: Aaron James On Ocean Philosophy And The Meaning In Surfing
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In this episode, I speak with Aaron James, a philosophy professor who's also an avid surfer.

Staying Alive in the Underworld, Part Two: Jill Heinerth On A Life Diving the Deepest Caves On The Planet
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In this episode, Part Two of my conversation with Jill Heinerth, cave diver, underwater photographer, and explorer-in-residence for the Royal Canadian Geographic Society.

Staying Alive in the Underworld, Part One: Jill Heinerth On A Life Diving the Deepest Caves On The Planet
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In this episode part one of my conversation with Jill Heinerth, cave diver, underwater photographer, and Explorer-in-Residence for the Royal Canadian Geographic Society

A Good Day To Die: Sea Shepherd Founder Captain Paul Watson On The Compassion Behind Confrontation
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In this episode, my conversation with Captain Paul Watson, founder of Sea Shepherd, the environmental organization known for interventions with whaling ships around the world.

Season Two Is Coming! A Sneak Preview
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Season Two Is Coming!  And the newest episode premieres on Tuesday December 15th.

Season One Finale: An interview with our hosts and a look ahead to our upcoming season.
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Season One Finale: An interview with our hosts and a look ahead to our upcoming season.

Whale 2.0: Shane Gero on decoding the language and culture of sperm whales (Part Two)
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Part Two of our conversation with Behaviour Ecologist, Shane Gero, on his research efforts to decode the sophisticated language and culture of one of the deepest divers in the ocean - sperm whales.

Whale 2.0: Shane Gero on decoding the language and culture of sperm whales (Part One)
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Part One of our conversation with Behaviour Ecologist, Shane Gero, on his research efforts to decode the sophisticated language and culture of one of the deepest divers in the ocean - sperm whales.

Dancing with Sea Lions: Lindsay Pullin on how a dive with Sea Lions in a kelp forest held a deeper connection
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Dancing With Sea Lions: Lindsay Pullin on how a dive with Sea Lions in a kelp forest held a deeper connection

Going Nuclear: Kyra Richter on her life as a nuclear power plant diver
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When Scuba Diving Goes Nuclear: Kyra Richter on her life as a nuclear power plant diver

A Mermaid's Tale: Linden Wolbert on living her life as a siren of the sea
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A Mermaid's Tale: Linden Wolbert on living her life as a siren of the sea

Murder at the Pond: Mike Berry on The World of Underwater Criminal Investigation
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Murder at the Bottom of a Pond: Michael Berry on his life as an Underwater Scuba Criminal Investigator

Divers Unmasked: Stephan Whelan, founder of DeeperBlue.com, on the evolution of the diving community and who divers really are
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Stephan Whelan, founder of DeeperBlue.com, on the evolution of the diving community and who divers really are

Becoming Part of the Pod: Hanli Prinsloo and how freediving connects her with marine wildlife
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This episode's guest is Hanli Prinsloo, a former competitive free diver, turned environmentalist based out of Cape Town.

The Howard Stern of Scuba: Greg Holt, Founder and Host of Scuba Radio, on making waves in the dive community and meaningful connections underwater
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Greg Holt, Host of Scuba Radio, the world's longest running and most popular radio show for divers

Living with Sharks: Colleen McKinnel on the intensity and magic of a tiger shark dive in Fiji
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Colleen McKinnel describes the intensity and magic of a dive with tiger sharks in Fiji and what being a scuba diver means to her

The Deepest Man in Holland: Daan Verhoeven and how freediving opened up an understanding to his late father's legacy
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Dutch freediver and photographer Daan Verhoeven. When Paul sat down to talk with him, Daan discussed how exploring the depths of the ocean while free diving had unlocked a way of dealing with his recurring depression but had also led to the discovery of a special connection to his late father, a renowned Dutch philosopher in the most unusual of places.

The Heart of the Ocean: Skylar Bayer on how discovering that she could no longer scuba dive started a remarkable journey to the bottom of the ocean
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Skylar Bayer on how discovering that she could no longer scuba dive started a remarkable journey to the bottom of the ocean.

Saltwater People: Maritime Anthropologist Michael Adams on his personal journey to our ancient connections in the ocean
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Michael Adams a professor of human geography at the University of Wollongong in Australia. When Paul sat down to speak with him, they discussed how free diving had changed his entire way of looking at things, from Aboriginal views on connections to nature to meditative takes on his own mortality.

An Ocean of Stories: Welcome to the Big Deep Podcast!
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Episode 1: Welcome to the Big Deep Podcast, a podcast about people who have a connection to the ocean, a connection so strong it has transformed some aspect of their lives.

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