Older than dinosaurs, these 8 ancient fish existed millions of years earlier and some still survive today in oceans, rivers and deep waters.

Certain small fish, like pearlfish, have evolved a bizarre survival strategy by taking refuge inside sea cucumbers. These fish enter through the anus, finding protection from predators within the ...

SACRAMENTO — A fish species that's been gone for more than 50 years is now making a comeback. The pond at Granite Regional Park is the new home of the long-lost aquatic species, the Sacramento perch.

Reef fish in different oceans often develop similar color patterns because evolution explores the same set of biological ...

Freshwater fish species have an uphill battle for survival, especially with a changing ecosystem. “So, we’re trying to see ...