“In most parts, the wahoo is a highly prized sport fishing catch. It reaches a good size, is often available not too far from land, and is a very good fighter on light to medium tackle. It is known in sports fishing circles for the speed and strength of its first run. The aggressive habits and razor-sharp teeth of the wahoo can be of considerable annoyance when targeting larger gamefish, however, such as tuna or marlin.
Its body is elongated and covered with small, scarcely visible scales; the back is an iridescent blue, while the sides are silvery, with a pattern of irregular vertical blue bars and have razor sharp teeth. These colors fade rapidly at death. The mouth is large, and both the upper and lower jaws have a somewhat sharper appearance than those of King or Spanish mackerel.
Specimens have been recorded at up to 8 ft 2 in in length, and weighing up to 183 lb. Growth can be rapid. One specimen tagged at 11 lb grew to 33 lb in one year. Wahoo can swim up to 60 mph. They are some of the fastest fish in the sea.
The wahoo may be distinguished from the related Atlantic king mackerel and from the Indo-Pacific narrow-barred Spanish mackerel by a fold of skin which covers the mandible when its mouth is closed. In contrast, the mandible of the king mackerel is always visible as is also the case for the smaller Spanish mackerel and Cero mackerel. The teeth of the wahoo are similar to those of king mackerel, but shorter and more closely set together.
The barracuda is sometimes confused with mackerel and wahoo, but is easy to distinguish from the latter two species. Barracuda have prominent scales, larger, dagger-like teeth, and lack the caudal keels and blade-like tail characteristic of the scombrid (mackerel)” Wikipedia