Description: bright greenish blue above, yellow on sides, with capability of flashing purple, chartreuse, body tapers sharply from head to tail; irregular blue or golden blotches scattered over side; anterior profile of head on adult males is nearly vertical; head of females more sloping; the single dark dorsal fin extends from just behind the head to the tail; anal fin margin concave and extending from anus to tail. Similar fish: pompano dolphin Where Found: OFFSHORE, in warm waters. Size: common to 30 pounds Remarks: one of the fastest-growing fish, thought to live no more than 5 years; swimming speed estimated at 50 knots; spawns in warm oceanic currents throughout much of the year; young found in sargassum weed; feeds on flying fish and squid.