Pectoral Fin

A swimming creatures' pectoral fins are its side fins, which are usually near the middle of the body (counting from the top dorsal fin to the bottom pelvic fin). There are usually two pectoral fins, one for each side. On some species (such as stingrays and skates) there rounded fins on the sides are their pectoral fins, through it does not look like it to some.

A Manta ray's pectoral fins are called cephalic fins, and are located at right next to the mouth. The interesting thing is that these are placed out right, and are kept straight even when swimming.