Marlins are fish from the family istiophoridae, which includes about 10 species. a marlin has 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. marlins are among the fastest marine swimmers, reaching ~110 km/h (68 mph) in short bursts. however, greatly exaggerated speeds are often claimed in popular literature, based on unreliable or outdated reports.the larger species include the atlantic blue marlin, makaira nigricans, which can reach 5 m (16 ft) in length and 820 kg (1,810 lb) in weight and the black marlin, istiompax indica, which can re...

Source: Wikipedia