Growing to over 800 lbs, the goliath grouper is among the world's largest marine fish. After meeting a diver who was attacked by one, Cyril goes on a mission to catch these giants using a primitive and dangerous technique... And he'll even have to dive in shark infested waters and use himself as bait!

Cyril is recruited by researchers to catch ocean predators and swab their teeth to help develop antibiotics that save shark-bite victims.

Using only his hands and feet as bait, Cyril's on a mission to catch a powerful fish that can grow almost as big as a man: the catfish! It's one of the most extreme and dangerous fishing techniques in the world, and was practiced by Native Americans hundreds of years ago.

On a mission to catch one of the largest freshwater fish in the world, in one of the most remote places on the planet, Cyril's survival skills are about to be tested! After training with the Brazilian Army's special forces unit, CIGS, specialists in this harsh environment, Cyril embarks on a journey deep into the heart of the Amazon rainforest.

Feared because of its resemblance to the alligator, its mouth filled with needle-like fangs, and its reputation as a potential threat to people, the prehistoric alligator gar was mercilessly hunted to the edge of extinction. Now, Cyril's in Texas recruited by biologists to collect data to better understand these mysterious animals and help them recover.