The Marlin (also known as the spearfish) is a large game fish with an elongated body, a spearlike snout, and a long rigid dorsal fin, which extends forwards to form a crest. Measuring up to 2.5 m long, marlins are fast swimmers. They occur in all seas and hunt small fish.
The larger species include the blue marlin (Makaira nigricans) which grows to 14.6 feet (4.6 m) long and around 992 pounds (450 kg). They are popular sporting fishes in certain tropical areas and are also commercially important as a food fish.
A marlin is a primary character in Ernest Hemingway’s The Old Man and the Sea.