For years, scientists felt like the fish they were watching watched them back. A new study suggests they can recognize a ...

Guppies are like confetti with fins—tiny, cheerful, and colorful in all the right ways. They're often the first fish people fall for, thanks to their adaptability and endless color combinations.

Two new species of fish were discovered in tributaries of the Black Warrior River System in Alabama, according to a study. Photo from Bernie Kuhajda A collection of colorful fish that are crimson ...

Its colorful appearance and unique locomotion make it a favorite among marine enthusiasts. Sea robins are bottom-dwelling fish with large, wing-like pectoral fins. These fins can spread out like a ...

Deep-sea fish adapt to some of the most extreme conditions on Earth. New research analyzing their evolution finds the same mutation across fish species that have evolved on separate timelines — ...