COBIA or (Rachycentron canadus), a very voracious game-fish, cosmopolitan in warm seas, the only genus of the family Rachycentridae which, according to G. A. Boulenger, is allied with the mackerel-like fishes. The fish is slender and somewhat pike-like, reaching a length of five feet. The head is flattened and the lower jaw pro jecting. The tail is strong and forked, the upper lobe slightly the longer. The soft dorsal fin is long and low ; in advance of it about eight low, isolated spines constitute the spinous dorsal. The anal is almost as long as the dorsal. This fish is dark olive green above, shading into lighter brownish-green and silvery. On the sides two distinct dark stripes parallel each other, one from tip of upper jaw to tail; the other starting at the origin of the pectoral fin. (See FISH.)