Learn about the evolutionary ease of cichlid fishes, which transition from simple to complex teeth (and vice-versa) faster ...

It’s not what you do, it’s how readily you do it. Rapid evolutionary change might have more to do with how easily a key ...

There is some anecdotal evidence indicating that fish do recognize individual humans, but this evidence comes exclusively ...

Every new aquarist dreams of filling their new aquarium with beautiful creatures. However, it’s important to do research ...

Specifically, the male dolphins rolled over onto their backs, displayed their male members, and launched a stream of urine as high as 3 feet into the air. This usually occurred when other males were ...

No, you can't cuddle them, but these fish sure are adorable. Here's what to know before adding them to your tank.

Eggs from a rare Mexican fish species believed to be extinct in the wild have successfully hatched at Bristol Zoological ...

Introduced species can disrupt delicate food webs. The Nile perch, for example, devastated native cichlid populations in Lake ...

Over four years, a team from Canada’s CetAsia Research Group traveled to the Amazon river, where they then closely watched river dolphin social interactions. Researchers documented a total of 36 ...