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.

The Pacific Northwest is known for things that are BIG giant redwoods, sweeping coastlines and massive runs of salmon.

Zeb Hogan is on the hunt for a goldfish the size of a cow! Giant carp can grow up to weigh 600 pounds and measure 10 feet long, but the trouble with finding these monster fish is they only live in three of Southeast Asia's rivers

It's a voracious predatory catfish that prowls the rivers of Southeast Asia.

Zeb is on a quest to catch a river shark to determine the truth behind their deadly reputation.