Here's a question - if piranhas are so ferocious and will attack anything, why aren't they the only fish in the Amazon? Well, in some cases, it's because other fish possess bite-proof armor. The ...

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 ...

(UPI) -- The natural body armor of the South American arapaima fish is so tough that it can withstand the piercingly fierce bite of a piranha without a problem. With its streamlined body and flat head ...

An ancient Amazonian fish with thick piranha-proof scales may hold the secret to building better bullet-proof body armor, puncture resistant gloves or even safety goggles and CD cases. Researchers at ...

It's a matchup worthy of a late-night cable movie: put a school of starving piranha and a 300-pound fish together, and who comes out the winner? The surprising answer -- given the notorious guillotine ...

(CNN) — A huge fish that is impervious to piranha attacks could become the inspiration for a new class of ultratough composite materials. Its scales are so tough that piranha teeth crack when they ...

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 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), ...

video: It's a matchup worthy of a late-night cable movie: put a school of starving piranha and a 300-pound fish together, and who comes out the winner? The surprising answer -- given the notorious ...