The Amazon’s fish live in water that can change dramatically with the seasons. In some places, oxygen levels fall so low that ordinary gill breathing is not enough. Several Amazonian species have ...

If you liked this story, share it with other people. Amazon basin fish species living in lakes, floodplain forests and river systems need a high degree of connectivity to stay genetically diverse and ...

Some fish swim in synchrony. Others, it turns out, breathe in synchrony. This is true for arapaimas, an obligate air-breathing species living in the Amazon. A new study in Communications Biology, led ...

If you liked this story, share it with other people. Following proof of the presence of microplastics in Amazonian rivers, streams and lakes, researchers are investigating how these particles affect ...

Add Yahoo as a preferred source to see more of our stories on Google. Thousands of fish species — about 2,500 of them named — call the Amazon River home, but scientists estimate nearly half of the ...

The fires burning through the Brazilian Amazon are a threat to the fish that rely on forest flooding to survive, raising fears the fish will be lost. The Amazon rainforest in Brazil is still burning, ...

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 fish larger than a man, tasty as well as beautiful, the freshwater pirarucu is a favorite with poachers in a lawless part of the Amazon jungle where Brazil, Peru and Colombia meet. Prized for its ...