'River Monsters': The biggest catch of Jeremy's career

On the season finale of "River Monsters," Jeremy Wade traveled to Guyana to investigate the so-called "water mama."

According to locals, the mysterious creature was abducting people. Locals said that many people were disappearing into the water, never to be seen again. Jeremy's investigation led him to believe the creature responsible for these disappearances was an arapaima, a massive fish that's known to travel between lakes and rivers. Jeremy had to get permission to fish for an arapaima, because it's an endangered species.

JEREMY: "This is the biggest fish of my South American fishing career. A river monster as deadly as any beast of folklore."

Like always, Jeremy tossed the fish back in the water.

Obviously, he wasn't afraid of the massive fish. He recently swam alongside some captive manatees and arapaima in Singapore to promote the show.

The Straits Times reports that's actually a big deal for the 58-year-old, as one rammed him in the chest 15 years ago.

Fans were loving Jeremy's bravery, as usual, and they couldn't get enough of the show on Twitter.

Can't get enough? Check out this fan favorite clip: