Jakub wants to catch the Amazon's largest freshwater fish; he hunts for deep pools and oxbow lakes.

Jakub enters the Mongolian wilderness on the hunt for a rare fighting fish. Nicknamed the River Wolf, the giant taimen is a two-meter-long predator with a cavernous, tooth-lined mouth.

Jakub Vagner searches for the mighty goliath tigerfish, and he heads up one of the world's most powerful and dangerous rivers to catch this giant predator with 32 shark-like teeth.

Jakub's heading up toward the Canadian sub-Arctic on a mission to prove it's possible to catch a northern pike, even when their natural habitat is completely frozen over.

Jakub Vagner goes to Thailand on the hunt for a giant freshwater stingray.

Jakub Vagner's on a fishing quest to three of Europe's largest rivers, in the hope of catching a giant wels catfish and reclaiming a world record.