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 ...

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 ...

This is a close-up of two Arapaima scales, overlapping as they would in nature. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by ...

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 ...

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), ...

WASHINGTON (Reuters) - One of the world's largest freshwater fish is protected by the natural equivalent of a "bullet-proof vest," helping it thrive in the dangerous waters of the Amazon River basin ...

High-tech imaging of carp scales by Berkeley Lab scientists reveals remarkable properties that could lead to advanced synthetic materials Humans have drawn technological inspiration from fish scales ...

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 ...