The sea lamprey looks like it’s from another planet, but this ancient creature has a surprising amount in common with humans ...

Cold-water streams have experienced disproportionate impacts, experiencing more than a 50% decrease in fish abundance over the last three decades, according to a study published Wednesday in Nature.

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 ...

Scientists have unearthed a fossilized fish that was once the biggest vertebrate of its day. The predatory sea creature, dubbed Megamastax amblyodus, which means "big mouth, blunt teeth," prowled the ...

The composition of fish populations in streams and rivers across the U.S. have been severely altered as a result of changing ...

A mass extinction of fish 360 million years ago hit the reset button on Earth’s life, setting the stage for modern vertebrate biodiversity. The mass extinction scrambled the species pool near the time ...

The fish that limbed vertebrates evolved from don't have obvious digit equivalents, and the most common types of fish just ...

Scientists in Australia have unearthed beautifully preserved fossilized hearts and other internal organs of ancient armored fish in a discovery that provides insight into the evolution of the bodies ...

Documenting fish noises isn’t exactly easy. The underwater creatures aren’t as loud as birds or whales; they also make noises ...

A new discovery by our team, published in the Swiss Journal of Palaeontology, shows the start of this process dates back more than 380 million years. The first evidence of teeth in any vertebrate ...

Tuna, salmon, mackerel. I’ve never looked at my afternoon sushi and wondered if it’s related to humans. So, I asked one of those friends named Thomas Siek. He’s a biological anthropologist at ...