They light their stripes moments before striking prey
Marlins can change colour, flashing their stripes just before an attack. Apex predators of open seas, they carry a spear-like bill and a tall dorsal crest that inspired both their common name—likened to a sailor's marlinspike—and exaggerated speed myths in popular writing.
Marlins form the family Istiophoridae, with nine to eleven species depending on the authority. The family name comes from Istiophorus, Shaw's 1792 placement of the sailfish, from Greek istion, sail, describing the towering dorsal fin. Bodies are elongated with a rigid crest-like dorsal fin extending forward. Closest living relative among billfish is the swordfish, sole member of Xiphiidae; carangiform fishes are thought next nearest, while genetic ties to mackerels are only slight despite older assumptions.
Atlantic blue marlin, Makaira nigricans, can reach five metres and 820 kilograms; black marlin, Istiompax indica, can exceed five metres and 670 kilograms. Both draw sport fishers in the tropics. Atlantic blue and white marlin are endangered from overfishing. A continuous fossil record runs from the Miocene, with the oldest uncontroversial fossils about twenty-two million years old, likely evolving in the Paratethys Sea. Claims of extreme swimming speeds in popular literature are often unreliable or outdated even though marlins rank among the ocean's fastest hunters.
Culture keeps the fish vivid: Santiago's eighty-fifth-day struggle in Hemingway's 1952 novel The Old Man and the Sea, Frederick Forsyth's Mauritius tale "The Emperor," a climactic scene in Christina Stead's The Man Who Loved Children, Miami's baseball Marlins and mascot Billy, even Nemo's clownfish father in Finding Nemo. Sport and story sit atop a biology of bills, crests, and sudden colour—open-water predators that signal readiness in stripes before the strike.
Source: Marlin
