After meeting a diver who was attacked by a giant grouper, Cyril goes on a mission to catch one.

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

Cyril sets out to catch a powerful catfish with only his hands, in Oklahoma's muddy waters.

After training with Brazilian special forces, Cyril embarks on a journey to the Amazon rain forest.

The alligator gar fish goes back over 100 million years but has been hunted almost to extinction.

Cyril's goal is to help protect Brazil's largest prehistoric fish, the endangered arapaima.