The Amazon sailfin catfish is characterised by a body covered with bony plates and a thick, armoured structure. Native to ...

Thousands of fish species — about 2,500 of them named — call the Amazon River home, but scientists estimate nearly half of the marine creatures lurking in the massive stretch of water remain ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Two new colorful ...

Amazon basin fish species living in lakes, floodplain forests and river systems need a high degree of connectivity to stay genetically diverse and healthy, but this connectivity is threatened by ...

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 kilograms, by far the largest of 2,300 ...

The Payara, often called the vampire fish, is one of the most aggressive predators in South American rivers. In this video, I ...

A new type of giant Amazonian fish — one for which only a single species was known for more than a century — has been discovered in Brazil, scientists say. The fish is a new species of arapaima, which ...

In the Amazon, Johnny Appleseed may be a fish. When rivers in the Amazon Basin flood into surrounding forests and savannas, a fruit-eating fish called a tambaqui proves itself a champion at excreting ...

Amazon’s virtual voice assistant Alexa can go virtually anywhere thanks to Amazon’s Gadgets API, but her next destination is still kind of surprising: It’ll (sort of) end up in Big Mouth Billy Bass, ...

Villagers living near the Teles Pires and São Manoel dams in Brazil’s Mato Grosso state — including the Apiaká, Kayabí and Munduruku peoples — attest to poor water quality, lack of potable water, ...