Sailfish

A sailfish is any of the two marine fish species in the genus Istiophorus that are members of the Istiophoridae family (marlins). They are primarily blue to gray in color, with a distinctively big dorsal fin known as the sail that typically runs the length of the back. Another distinguishing feature is the elongated rostrum, which is similar to those of other marlins and swordfish, which collectively are known as billfish in sport fishing circles. Sailfish are found in the colder pelagic regions of all of the world's oceans, and they have the quickest speed of any marine mammal. This is one of the fastest animals in the world.

Many experts consider sailfish to be the fastest fish in the ocean. They develop swiftly, reaching 1.2–1.5 m in length in a single year, and graze on smaller pelagic forage fish and squid near the surface or in the intermediate depths. Sailfish were formerly thought to be capable of swimming at speeds of up to 125 km/h.

Speed: 70mph