Why do sharks have fins?

The pectoral fins keep the shark from drowning and are located where the gills end. They are the big fins that resemble the wings on an airplane. Further down are pelvic fins and they keep the shark from rolling, they're stabilizers. read more

The anal fin is not present in all shark species but it works as another stabilizer for the ones that do have this fin. The Caudal fin is what some might call the tail fin. It is a powerful and the swishing of this fin propels the shark forward. read more

Dorsal fin of a shark A dorsal fin is a fin located on the back of most marine and freshwater vertebrates such as fishes, cetaceans (whales, dolphins, and porpoises), and the (extinct) ichthyosaur. Most species have only one dorsal fin, but some have two or three. read more