New fossil evidence from China suggests that some of our vertebrate ancestors had four eyes. The study, published in Nature, ...

When oxygen disappears, most fish suffocate. This one ferments its own metabolism and waits months for spring beneath frozen ...

Mudskippers break the rules of fish biology by breathing through their skin, walking on their fins and thriving on land where ...

A massive ice age wiped out ocean life 445 million years ago, reshaping ecosystems and setting the stage for jawed fish ...

Did you know there are more than 500 species of sharks out there in the world? These fascinating underwater creatures have been swimming in our seas for about 455 million years, and they can travel ...