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), ...

A colossal freshwater fish that can reach up to 10 feet in length has mysteriously washed up on a shoreline in Florida. The arapaima is a predatory fish native to the Amazon, but one was found dead on ...

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, ...

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 ...

The giant arapaima, the Amazon’s biggest fish, was under threat. Rolex Awards for Enterprise Laureate João Campos-Silva is engaging with local fishing communities to save it—and in doing so, setting ...

The Arapaima (Arapaima gigas), also known as the Pirarucú or Paiche, is the world’s largest freshwater fish. It can reach lengths of up to 14.75 feet (4.5 m) and weigh up to 440 lbs (200 kg). Because ...

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 ...

The U.S. Air Force studied how an Amazonian fish can survive in the same waters as schools of deadly piranha. The arapaima, a slow-moving, torpedo-shaped fish should be easy prey for a pack of the ...