While the common ancestor of vertebrates with synovial joints is still a mystery, the oldest specimen with evidence of these ...

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

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.

A tuna-shaped robot takes advantage of the real fish’s secret for speed and nimbleness: selectively folding or sticking out its fins, a feature that could improve aquatic robot designs.

It's one of the "four treasures" of Cantonese cuisine, along with abalone, sea cucumber, and shark fin. But the main reason fish maw is so desired is its supposed medical value. Because of its ...

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 ...

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 ...