An Amazonian lake reached 106°F recently, and that heat killed hundreds of river dolphins - an alarming sign of climate ...

A mass fish die-off in Brazil’s Amazon River region has killed an estimated 20-30 metric tons of fish and other aquatic animals, following one of the worst droughts in Amazonian history. On the night ...

A new fish species has emerged, but it does not hail from the realm of Mordor as its name suggests. The relationship between pacus and piranhas has been closely studied by researchers and while the ...

A new species of piranha-like fish called pacu was recently found hiding in plain sight among several near-identical species in the Amazon River. Researchers have named it after Sauron from "The Lord ...

By Shanna Hanbury Five out of 10 lakes in the central Amazon had daytime temperatures over 37° Celsius, (98.6° Fahrenheit) ...

“If you’ve tasted jaraqui, you’ll never leave here,” Márcio da Silva Santos, the tuxaua, or the chief community leader of an Amazonian village named Betel, told the Science reporter Daniel Grossman ...

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. Like the ...

PUERTO NARINO, Colombia — A flash of pink breaks the muddy surface of the Amazon River as scientists and veterinarians, waist-deep in the warm current, patiently work a mesh net around a pod of river ...

In a groundbreaking expedition, researchers from Harvard and Amazonas State University began monitoring water quality and mercury contamination in the Amazon Basin’s largest tributary. The Madeira ...

If you are looking for a real adventure, an exotic location, battles with big, strong, angry fish on a fly rod, the waters of the Amazon jungle are all of that and more. One question I get asked all ...

Legend has it that the Santiago river used to swallow the canoe of anyone trying to explore it. Now an indigenous community is discovering surprising species in its waters. We stepped into the wooden ...