Description: Color 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 embedded scales, blunt at end; lateral line curved over pectoral, then straight to base of tail.
Similar Fish: White marlin, T. albidus, young blue marlin, M. nigricans (spectacular sail-like dorsal of sailfish is most notable difference).
Where Found: Offshore species, in south Florida associated with waters near the Gulfstream; 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 knots; feeds on the surface or at mid-depths on smaller pelagic fishes and squid.