The man on a mission to re-wild the oceans with sharks

RNZ - All Programmes26mApril 7, 2026

Get the full intelligence

Search transcripts, export clips, track mentions, and explore all topics from “The man on a mission to re-wild the oceans with sharks” inside PodZeus.

AI-Generated Summary

Mark Erdman, a marine conservationist and founder of ReShark, is leading a groundbreaking initiative to rewild the oceans by restoring Indo-Pacific leopard shark populations to their native reefs in Raja Ampat, Indonesia. Once decimated by the shark fin trade, these sharks are now being bred in captivity at global aquariums and shipped as eggs to Indonesia, where they are hatched and raised in specially designed nurseries before being released into the wild. The project, which began in 2023 with just four pups, has now released 68 individuals and aims to reach 500 to establish a self-sustaining population. The effort combines cutting-edge conservation science with community engagement, including education programs for local children and partnerships with Indigenous communities. ReShark has also expanded to Thailand and is planning projects in Fiji, Papua New Guinea, and the Maldives. The initiative not only restores ecological balance but also boosts eco-tourism and inspires local stewardship. Erdman, originally from the U.S. and trained in marine science, shifted from academic research to hands-on conservation after witnessing the rapid degradation of coral reefs in Indonesia. His work with manta rays in New Zealand further underscores his commitment to large-scale marine recovery through science, technology, and community-driven action.

Key Takeaways
1

ReShark is the world’s first shark rewilding program, using captive-bred leopard shark eggs to restore populations in Raja Ampat, Indonesia.

2

Genetic screening ensures only Pacific-origin leopard sharks are used to avoid 'genetic pollution' and maintain ecological integrity.

3

Eggs are shipped globally in oxygenated bags and hatched in low-tech, community-run nurseries where 'shark nannies' raise pups on live food.

4

Post-release monitoring via acoustic and satellite tags reveals sharks can travel hundreds of kilometers, proving their adaptability and potential for recovery.

5

The project has strong community benefits, including youth education, local employment, and increased eco-tourism centered around shark sightings.

…and 3 more takeaways available in PodZeus

Chapters
0:00
4 min

The Birth of ReShark: A Mission to Re-Wild the Oceans

It wasn't that big of a jump to think what if we were to do what, you know, Kiwis are very good at doing with Kakapo and Takahe and things. What if we were to do a rewilding project?

Highlight
4:00
6 min

Raja Ampat: The World’s Most Biodiverse Reef System

Erdman describes Raja Ampat as a tropical paradise with unparalleled coral reef biodiversity, likening it to Fiordland in New Zealand, and explains how its marine sanctuary was established through Indigenous-led conservation.

10:00
7 min

From Egg to Release: The Science of Shark Rewilding

Within hours of hatching, these little shark pups are quite proficient at literally sucking the snails out of their shells, a little escargot in the morning.

Highlight
17:00
6 min

Post-Release Monitoring and Shark Behavior

They actually get quite bummed out if one of their friends gets released before them.

Highlight
23:00
7 min

Scaling the Vision: Expanding to Thailand, Fiji, and Beyond

ReShark has launched in Thailand and is planning projects in Fiji, Papua New Guinea, and the Indian Ocean, aiming to restore leopard sharks across their entire species range.

High-Impact Quotes
Within hours of hatching, these little shark pups are quite proficient at literally sucking the snails out of their shells, a little escargot in the morning.
Mark Erdman11:37
Viral: 90.0
If we're not busy conserving, well, there's not going to be anything left to study other than destroyed reefs.
Mark Erdman25:59
Viral: 88.0
It wasn't that big of a jump to think what if we were to do what, you know, Kiwis are very good at doing with Kakapo and Takahe and things. What if we were to do a rewilding project?
Mark Erdman5:13
Viral: 85.0
Speakers

Host

Catherine

Guest

Mark Erdman
Topics Discussed
shark rewilding95%marine conservation90%community-based conservation88%ecosystem restoration85%genetic management in conservation80%marine migration and tracking78%marine education and outreach75%shark fin trade70%
People & Brands

Indo-Pacific leopard shark

other

18xPositive

Mark Erdman

person

15xPositive

Raja Ampat

place

14xPositive

ReShark

organization

12xPositive

manta ray

other

7xPositive

Singapore Aquarium

organization

6xPositive

New Zealand Oceanic Manta Ray

other

6xPositive

Fiji

place

5xPositive

bow mouth guitarfish

other

5xPositive

Seattle Aquarium

organization

4xPositive

Get the full intelligence

Search transcripts, export clips, track mentions, and explore all topics from “The man on a mission to re-wild the oceans with sharks” inside PodZeus.

Start discovering podcast insights today

Start with a 7-day trial and explore a growing catalog of popular podcasts. No credit card required.

No credit card required • 7-day trial • Cancel anytime