Dorsal fin

As Finn ( rarely also called dorsal ) refers to the dorsal fin of sharks and whales.

The fin has a highly distinctive triangular shape and is used primarily to stabilize the movements of the fish or Wales. The fin is a key identifying feature, as can be determined the type of shark or whale based on location and size, shape and color. In addition, well illustrated by the Finns single individuals of the same species differ.

Seen tribal History, is at the outer similarity of the fin of sharks and whales to an analogy, that is, a parallel development due to similar environmental conditions.

In Asia, shark fins are considered a delicacy. The separation ( the so-called "fins ") of the fins is done for example in the Maldives alive.