Measuring 10 feet (3 meters) long and weighing in at more than 400 pounds (180 kilograms), it's hard to imagine that the arapaima, the largest fish in the Amazon River basin, could ever go missing.

The armor that a massive Amazonian fish evolved against piranhas could lead to better body armor for soldiers, researchers say. The arapaima (Arapaima gigas) is one of the largest freshwater fish in ...

The arapaima or pirarucu, native to the Amazon. (Jeff Kubina via Wikipedia [CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0)]) (CN) – The design of the ...

A new species of the giant fish arapaima has been discovered from the central Amazon in Brazil, raising questions about what other species remain to be discovered and highlighting the potential for ...

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, ...

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 ...

Fish that live in piranha infested waters have evolved scales to protect them from the predator's fearsome teeth and are being used to develop new types of body armour The protective scales of ...

If you liked this story, share it with other people. In February, Florida officials identified the body of an arapaima (Arapaima gigas) that had washed ashore from the Caloosahatchee River. An expert ...

Measuring 10 feet (3 meters) long and weighing in at more than 400 pounds (180 kilograms), it's hard to imagine that the arapaima, the largest fish in the Amazon River basin, could ever go missing.