Species: Alopias vulpinus, Thin tail thresher shark, Thintail thresher

Alopias vulpinus (Bonnaterre, 1788)

Thin tail thresher shark

Body stout, cylindrical; head short, rounded between eyes; forehead profile convex; no groove on nape; snout short, conical; eyes small, mouth small, ventral; teeth sharply triangular; gill openings - 5, short, last 2 over pectoral base; first dorsal large, nearer pectoral than pelvic; second dorsal and anal very small; pectorals very long, narrow, curved, with pointed tip; pelvics large; tail not lunate, upper lobe extremely long, ~ equal to body length, small lobe at tip of long lobe about 2x length of 2nd dorsal fin base; no keels on tail base.