A new technique for sexing a giant Amazon fish may help create a sustainable source of protein in South America, report researchers writing in Fish Physiology and Biochemistry. Facing depletion ...
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), ...
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