RIO NEGRO, Brazil (WTHR) - One of the most popular things to do in the Amazon rainforest is fishing for piranha. In Sept. 2015, photographer Steve Rhodes and I spent several days at the Anavilhanas ...

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 ...

A freshwater Amazonian fish has evolved scales with microscopic armorlike structures specially designed to resist a piranha's piercing bite, new research shows. Arapaima gigas is the largest — and ...

There’s more to Brazil than the Olympics: There’s the Amazon River, 4,000 miles long and teeming with 3,000 species of fish, including the deadly piranha. Join NBC’s Keir Simmons as he goes fishing ...

Six years ago, the fish ecologist Rodney Rountree was on a skiff in the Peruvian Amazon. He was holding a piranha in his hand…underwater…in a river filled with ...

Researchers in a California biomechanics lab recently staged what should have been the most lopsided freshwater cage match of all time. In one corner was a red ...

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 ...

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 ...

Fish are probably not the first animals that leap to mind when thinking of seed dispersers. Squirrels are well-known examples, but researchers have recently tracked a species of frugivorous—that is, ...

Marine biologists have acquired a better understanding of the evolutionary history of piranhas. About 4 million years BP, rise in sea level appears to have brought about the isolation of small ...