As a fish swims through water, the dorsal fin stabilizes it and keeps it from ... Presti performed a thorough dissection of ...

Fins: Help a fish move. The top fins are called dorsal fins. If there are two dorsal fins, the one nearest the head is called the first dorsal fin and the one behind it is the second dorsal fin.

The head of the new species is not as sharp as the giant guitarfish, and the ends of its two dorsal fins are rounder--subtle differences. The giant guitarfish can grow to a maximum of 2.5 meters long.

Frogfish have four fins located on their back, known as the dorsal fins, that play important roles in the fish's lifecycle. The dorsal fins in the middle of the fish's body are used for engaging ...