The beautiful Guppy is one of the most low maintenance tropical fish out there - and will happily live in a small aquarium ...

The discovery of a golden scaleless fish in China is helping scientists understand how animals evolved to live in caves.

Experienced aquarium owners know they should research different fish species before putting them in their tanks. Some fish ...

A mysterious affliction that causes prehistoric, endangered smalltooth sawfish to spin erratically in Florida waters and ...

A survey of museum specimens reveals that more than a dozen species of the birds sport biofluorescence in feathers, skin or even inside their throats.

The waters of the United States hold a huge variety of fish species that live in its lakes, rivers, and coastal areas. From ...

Satellite images from space are allowing scientists to delve deeper into the individual functions of different tropical ...

A massive "Megalodon"-like goldfish caught last year in Pennsylvania has led to a new warning from the U.S. Fish and Wildlife Service -- don't let your pet fish loose in the wild.

Scientists discovered new fish species. These include a blob-headed catfish, a tiny pipehorse, and three pacu species.