Monster Fish - Season 4 (2013)

Armies of salmon surge through Alaska's icy waters during mating season, but only one catches the eye of Zeb Hogan the elusive king salmon. Local legends tell stories of king salmon so wide you could walk across their backs. But to find out if stories like this one are true, and if a Salmonzilla is really out there, Zeb will have to brave rugged wilderness, hungry bears and a local watering hole where the signature cocktail is salmon-flavored vodka!

It's a voracious predatory catfish that prowls the rivers of Southeast Asia. Growing up to two meters long, the wallago is a predatory catfish rumored to swallow monkeys, porcupines and even monitor lizards. Zeb Hogan travels to the jungles of Malaysia and deep into the wilds of Indonesian Borneo in search of one of Asia's largest freshwater fish.

Zeb Hogan, National Geographic Explorer and aquatic biologist, travels across Thailand and Cambodia in search of a goldfish the size of a cow. It's rumored to grow up to 600 lbs and 10 feet long. It's so rare most people have never even heard of it, the giant carp.