They are predatory fish and feed on small ... "In the past, different hamlets were thought to be diverse color variants of one species, but today we know that they are individual species.

Two new species of fish were discovered in tributaries ... Their back fins, called the caudal fin, are mostly turquoise, but the fish have sightly different colored bands, per the study.

Rainbow trout are the most common type of stocked trout, while golden rainbow trout are a unique hybrid species. Brook trout are the state fish and have a distinctive dark coloration with red spots ...

Paleontologists have discovered a newly identified fish species in Australia so well-preserved that they could determine its last meal — dating back up to 16 million years to the Miocene Epoch.

The new species was identified off the coast of the Yucatan Peninsula in the southwestern Gulf of Mexico. The body of water was renamed as the Gulf of America by executive order on Jan. 20 by ...