Fish biologist Zeb Hogan is searching for one of the freakiest fish in the world. Vampire fish, known locally as payara, weigh up to 40 pounds, hunt like great white sharks and have terrifying 6-inch fangs.

Join Zeb Hogan as he explores the maze-like river systems of Argentina on a quest to catch a colossal 400-pound short-tailed river ray, the largest freshwater stingray found in South America, and uncover the surprising sting hiding in its tail!

Join Zeb Hogan as he heads to southern France to try to catch a mammoth-sized 650 lb. Wels catfish and witness one of the most bizarre feeding behaviors he's ever heard of.

Zeb explores Florida's deep-water reefs on a mission to catch a seven-foot goliath grouper.

Zeb Hogan searches for a 400-pound short-tailed river ray in South America.

Zeb Hogan returns to Thailand to find the biggest monster fish on Earth.

Some adaptations can yield freakish results due to all of the unique environments of the oceans.

Zeb Hogan embarks on a six-continent journey as he seeks out the world's biggest and rarest fish.

Zeb Hogan searches for a ferocious fish with fangs and a ray with a hidden weapon.