MAMIRAUÁ RESERVE, Brazil — On this stretch of the Amazon River, you don't need a fish finder to locate the pirarucu, one of the world's largest freshwater fish. The splashing gives them away.

Researchers discovered a new species dwelling at the bottom of a river in the Amazon rainforest, according to a new study. Image from the Journal of Fish Biology A rare new species of fish was ...

Three pirarucu fish, captured by brothers Gibson ... Unlike other aquatic species of the Amazon, such as river dolphins, the pirarucu — also known as arapaima — historically have proven ...

Thousands of fish species — about 2,500 of them named — call the Amazon River home ... in spreading seeds through their diet of mostly fruit, which make them vital for the growth of ...

Smaller fish species are more nutritious, lower in mercury and less susceptible to overfishing, a Cornell-led research team has found. The team's study was conducted in the Amazon River ...

The rich organic matter that gives the largest tributary of the Amazon River, the Rio Negro, its characteristic black hue may provide fish with some protection from the negative effects of copper ...

Every spring when the rains fall in South America, the Amazon River and ... handy for rooting through river mud for crustaceans or darting among branches after small fish. Echolocation allows ...

The Madeira River, the largest tributary of the Amazon, has been losing water ... bodies for small-scale agriculture, wild fruit extractives, fishing and transportation. The Madeira is ...