Description: Dark blue on top, brown-blue laterally, silvery white underbelly; upper jaw elongated in form of spear; first dorsal greatly enlarged in the form of a sail, with many black spots; its front squared off, highest at its midpoint; pelvic fins very narrow, reaching almost to the anus; body covered with imbedded scales, blunt at end; lateral line curved over pectoral; then straight to base of tail.
Similiar Fish: White marlin, young blue marlin.
Where found: Over reefs and offshore. In south Florida, near Gulf Stream. Off the panhandle near the 100-fathom line.
Size: Common to 7 feet.
Remarks: Rapid growing species, reaching 4 to 5 feet in a single year; swims at speeds up to 50 knows; feeds on the surface or at mid-depths on smaller pelagic fishes and squid.