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

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 ...

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 ...

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 ...

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.

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 ...

It is one of several new finds that could rewrite how scientists understand fish evolution. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

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

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

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 ...