Meet the Atlantic wolffish, green humphead parrotfish, and other unusual species with extraordinary adaptations.

Scientists have taken an unprecedented look at marine fish species living in the world's oceans by studying traces of genetic ...

"Could wreak havoc." Researchers raise red flags after observing concerning shift in marine species behavior: 'The past is no ...

DNA in seawater revealed that 93% of fish species live beyond known ranges, exposing major gaps in global marine biodiversity ...

The fish was found at 200 to 2,000 meters below the surface. At least 16 types of recently discovered deep-sea fish are among the darkest creatures ever found, according to a study published Thursday.

A new species of Polynesian clownfish was discovered and named Amphiprion maohiensis, thanks to a detailed DNA study.

Long ago, some saltwater fish adapted to freshwater — and in doing so, developed an extraordinary sense of hearing rivaling ...

A new study of coral reefs in Papua New Guinea shows ocean acidification simplifies coral structure, making crucial habitat less appealing to certain fish species. A new study of coral reefs in Papua ...

A group of wildlife biologists recently made a rare discovery after finding a fish thousands of miles away from where it was spawned. The Aquatic Invasive Species Crew from the Kansas Department of ...