Getting a glimpse of an endangered prehistoric fish is easier than you might think.

A tiny, walking, permanently frowning fish living in just two small patches of ocean reef became the unlikely symbol of one photographer's most extraordinary milestone yet.

Researchers identified a new freshwater fish species in South Africa after years of genetic testing and analysis. Zoosystematics and Evolution Zoosystematics and Evolution A team of scientists went ...

For 20 years, photographer Joel Sartore has been documenting animals through his Photo Ark project, which has now reached its ...

A research team traveled to South Africa's Umzimkhulu River in 2017 with a specific mission: find surviving pockets of the Maluti redfin minnow, a species declared extinct after introduced trout wiped ...

A fish previously declared extinct has been released back into the wild in Australia. The olive perchlet, a small oval-shaped fish with large eyes, was considered extinct in Victoria, Australia, in ...

State regulators say a wastewater permit protects aquatic life, but opponents say old survey data is not enough for discharge into a tiny Lake Superior tributary.

As the Atlantic warms, many fish along the east coast of North America have moved northward to keep within their preferred temperature range. Black sea bass, for instance, have shifted hundreds of ...