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.

Some dorsal fins look like a skinny finger extending from ... For his May paper in Scientific Reports, Presti performed a ...

Local shark expert Chip Michalove said it appeared to be a lemon shark, a species easily recognized due to its two dorsal fins. Lemon sharks are known to travel close to shorelines but pose little ...

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.