The typical dorsal fin is a triangular-shaped piece of skin wrapped around muscles and bony spines or rays that sits on a ...

The Northern sea robin, found along the western Atlantic, is notable for its wing-like pectoral fins and its ability to 'walk ...

Their streamlined torpedo shape helps them gather enough underwater speed to break the surface, and their large, wing-like pectoral fins get them airborne. Flying fish are thought to have evolved ...

A video capturing the moment the silvery fish with its distinctive orange fins was found has already racked up over nine million views on Instagram. In the footage, a man in swimwear approaches ...

Owners should also watch out for infection and diseases such as fin rot, dropsy, and swim bladder disease. While Betta fish can tolerate dirty water for a short period, long exposure can cause ...

In the arid mountains of northern Oman, rocky caves hold pools of water.

The coelacanth has gills similar to those of fish living at the depths in which ... these fishes' paired lobe fins are supported by the same basic bones as your arms and legs.

These upright fish have a dorsal fin that flutters 30 to 70 times per second to provide forward propulsion. They also have a set of small pectoral fins near the back of their head that are used to ...