Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Around 375 million years ago, the ancient fish known as Tiktaalik ...

Many people view European cisco roe as a delicacy. A new study has shown that there are different types of European cisco in Swedish waters that are each genetically adapted to fresh, saline or ...

A tiny desert fish survives in a sun-scorched cavern on the edge of extinction. Here’s how it’s offering scientists a rare glimpse into the extremes life can endure.

Some species of deep-sea fish have evolved blacker-than-black skin to protect them from being eaten – or to help them sneak up on fish they want to eat. A study, published last week in the journal ...

Cavefish have obvious adaptations such as missing eyes and pale colors that demonstrate how they evolved over millennia in a dark, subterranean world. Now researchers say these incredible fish have an ...