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), ...

This is the fish that was involved in the burglary, officials say. Arapaima are native to South America, the Florida Fish and Wildlife Conservation Commission reports. DeSoto County Sheriff's Office ...

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 ...

Some of the world’s most massive fish species are true giants of the aquatic realm, astonishing both scientists and anglers ...

Nat Geo Explorer Zeb Hogan has spent decades asking the question. “I thought there would be a simple answer,” he now concedes, after recording a 661-pound stingray. “I was wrong.” Scientists tag and ...