The Burmese python, green iguana and lionfish are, by now, well-known invasive species that have established a dangerous foothold in Florida. But a fearsome new invasive predator has emerged in the ...

A keystone species of the Amazon River ecosystem, the arapaima is a powerful predator known by many names. Mike Bock Reaching up to 10 feet (3 meters) long and weighing 440 pounds (200 kilograms), ...

The 10-foot-long arapaima was quickly disappearing in Brazil until local communities stepped in to save it—and themselves. A close-up view of an arapaima from the Brazilian Amazon shows its unique ...

It's a matchup worthy of a late-night cable movie: put a school of starving piranha and a 300-pound fish together, and who comes out the winner? The surprising answer -- given the notorious guillotine ...

Researchers have discovered a new species of fish that breathes air and has evolved to grow extra strong scaly skin that can withstand piranha bites. The fish is a new species of arapaima, a giant ...

FORT LAUDERDALE (CBSMiami/AP) — Florida is already in a battle with dangerous and invasive species like the Burmese python, green iguana and lionfish and now there's a new predator in the state called ...