Breaking News: Huge River Monster Found In Florida

According to The Smithsonian, arapaima are aggressive predatory fish, feeding on pretty much whatever it can fit into its vacuum-like mouth, including fish, birds, lizards and mammals. Because of a modified swim bladder that opens into its mouth like a lung, arapaima are able to live in water with little to no oxygen, which means they can survive on dry land for an entire day.

What’s worse, arapaima can also lay hundreds of thousands of eggs over their incredibly long life span of up to 20 years.

The fish has been a popular fixture of the Discovery Channel show “River Monsters,” and is often been referred to as a “Dinosaur fish,” not because of its tough, armored scales, but due to the fact that the species hasn't changed much at all in the fossil record for over 23 million years.