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)]) The arapaima or pirarucu ...

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 ...

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 ...

A project led by Robert Ritchie, professor of mechanical engineering and materials science at UC Berkeley, and Marc Meyers, professor of nanoengineering at UC San Diego, provides inspiration for fish ...

Speaking of scales, this giant fish has another superlative quality: “It has these very impressive armored scales on its body, which prevent penetration by predators teeth yet still makes the fish ...

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), ...

Diver Alex Reeson checks on the Arapaima or Pirarucu fishes in the tropical section of Europe's biggest freshwater aquarium Aquatis, due to open October 21, in Lausanne, Switzerland. Reuters ...

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 ...

Oct. 16 (UPI) --In a newly published study, scientists uncovered the secrets of the scales that protect Arapaima gigas, a large Amazonian fish, from the powerful bites of piranhas. Arapaima gigas is ...

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 ...