Many popular tropical freshwater aquarium fish originate in the world’s tropical rainforests. The Amazon Basin is a particularly rich source of fish — 5000 species are estimated to be swimming in its ...

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 ...

The pirarucu, the giant fish of the Amazon, was an endangered species. Due to conservation efforts, it's making a comeback. Now a big fish story - seriously. In the Amazon jungle, there is a species ...

CARAUARI, Brazil (AP) — Even in the most biodiverse rainforest of the world, the pirarucu, also known as arapaima, stands out. First, there is its mammoth size: It can weigh up to 200 kilos (440 ...