A search for a fish lost to extinction led to a brand-new species hiding in a South African river.

Researchers identified a new freshwater fish species in South Africa after years of genetic testing and analysis.

A dozen fish pulled from a South African river sparked years of debate before being confirmed as a new species.

A study published in the Nature journal alters how the evolution of fish has been historically understood. Fossilized fish and other sea creatures have often been pivotal in new scientific discoveries ...

A newly discovered golden cave fish in southwestern China is giving scientists an unprecedented look at evolution in action.

Editor's note: All opinions, columns and letters reflect the views of the individual writer and not necessarily those of the IDS or its staffers. We’ve all seen this poster in our middle school ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. The previously unknown Xingren golden-line fish appears to be still evolving for cave life. . | ...