Arapaima gigas is a big fish in a bigger river full of piranhas, but that doesn't mean it's an easy meal. The freshwater giant has evolved armor-like scales that can deform, but do not tear or crack, ...

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 ...

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 ...