Marlin

A marlin, family Istiophoridae, is a fish with an elongated body, a spear-like snout or bill, and a long rigid dorsal fin, which extends forward to form a crest. Its common name is thought to derive from its resemblance to a sailor's marlinspike. Even more so than their close relatives, the scombrids, marlin are incredibly fast swimmers, reaching speeds of about 110 kilometres per hour (68 mph).