Scientists who studied why the scales of a huge Amazonian fish, which lives piranha-infested waters, are some of the toughest in the world hope their work could help to create armor. The outer layer ...

Conservation efforts in the Brazilian Amazon have brought a giant fish called the arapaima back from the verge of extinction, National Geographic reported. A decade ago, the arapaima, which can grow ...

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), ...

Piranhas are among the most deadly creatures in the water, with razor-sharp teeth capable of slicing flesh easily, but a fish in the Amazon River basin has developed a "bulletproof vest" to protect ...

Arapaima gigas is a big fish in a bigger river full of piranhas, but that doesn't mean it's an easy meal. It's evolved armor-like scales that deform, but don't tear or crack, when a piranha -- which ...

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 ...

Zoo staff said that the fish were about 17 years old, which is the typical life span of captive arapaima. According to the press release, a necropsy carried out after the death of the fish initially ...

The rotting body of a dead Amazon "river monster" recently washed ashore in Florida, raising concerns about whether this gigantic predatory fish has joined the Sunshine State's ever-growing list of ...

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 ...