Spotfin Flyingfish

The Spotfin Flyingfish (Cheilopogon furcatus) is a member of the flyingfish family Exocoetidae within the order Beloniformes, the same lineage as needlefishes and halfbeaks. It is one of the most widely distributed flyingfish species, occurring in tropical and warm-temperate waters of the Atlantic, Indian, and Pacific Oceans. Like other flyingfish, it is not capable of true powered flight; instead it uses greatly enlarged, wing-like pectoral fins to glide above the sea surface for tens of meters after building speed with rapid beats of its lower tail lobe. This behavior is thought to help the species evade pursuit by fast-swimming predators such as dolphinfish and tuna. The species lives entirely in the open-ocean epipelagic zone and is rarely seen close to shore.

• Slender, cylindrical body typical of flyingfishes, tapering to a deeply forked tail with a longer lower lobe
• Dark iridescent blue-black dorsal coloration that changes abruptly to silvery-white on the flanks and belly
• Long, wing-like pectoral fins reach past the dorsal fin origin; fins are grey with a pale central band and pale rear edge (the "spots" giving the species its name)
• Pelvic fins are short, unlike the elongated pelvic "hindwings" of four-winged flyingfish species
• Reaches 15-24 cm in length, smaller than large four-winged flyingfishes
• Distinguished from the Sailfin Flyingfish by its forked (not sail-like) dorsal fin and longer pectoral fins

Spotfin Flyingfish inhabit the uppermost few meters of open, tropical and warm-temperate ocean water, generally far from shore over deep water rather than around reefs. The species has a near-circumtropical range, recorded from the western Atlantic (Massachusetts to southern South America), the eastern Atlantic near Cape Verde, and widely across the Indian Ocean and Indo-Pacific. It favors warm surface layers where sea temperatures stay above roughly 20°C and tends to follow seasonal shifts in warm currents. Juveniles and adults alike stay at or very near the surface, rarely descending more than about 20 meters, since gliding flight and surface feeding define nearly every part of their life cycle.

Spotfin Flyingfish are strong schooling fish, often gathering in loose surface aggregations that scatter explosively when threatened. To glide, an individual accelerates underwater with rapid sculling beats of the lower tail lobe, breaks the surface, and spreads its long pectoral fins to soar just above the waves, sometimes covering over one hundred meters in a single glide and adjusting direction with brief tail dips. This gliding is primarily an escape response from predatory fish such as tuna, dolphinfish, and billfish that hunt from below. The species feeds on planktonic crustaceans and small organisms near the surface. Spawning occurs in open water, with eggs bearing sticky filaments that attach to floating debris or sargassum weed rather than being laid on a fixed substrate.