The rockhead poacher is an odd fish whose name might hold dual meanings. The tiny creature is covered in bony armor and has a lumpy, rock-shaped head with a relatively large pit. Researchers have come ...

A newly discovered fish fossil is the earliest known creature with what might be recognized as a face. Entelognathus primordialiswas an ancient fish that lived about 419 million years ago in the Late ...

It's dazzling on the sandy floors of the ocean, but it's a nightmare for its prey. The bobbit worm is a gorgeous creature, but striking and deadly. It slices fish in two using its retractable ...

For nearly 20 years, a “rosy” creature has been a regular part of the aquarium trade. And while experts are familiar with the tiny animal, it has never been officially identified — until now.