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- The barracuda is a ray-finned fish known for its large size and fearsome appearance. Its body is long, fairly compressed, and covered with small, smooth scales. Some species can reach up to 1.8m in length and 30Â cm in width. The barracuda is a salt water fish of the genus Sphyraena, the only genus in the family Sphyraenidae, and is found in tropical and subtropical oceans worldwide. Barracudas are elongated fish, pike-like in appearance, with prominent sharp-edged fang-like teeth, much like piranhas, that are all of different sizes which are set in sockets of their large jaws. They have large pointed heads with an under bite in many species. Their gill-covers have no spines and are covered with small scales. Their two dorsal fins are widely separated with the anterior fin having five spines, the posterior fin having one spine and nine soft rays. The posterior dorsal fin is similar in size to the anal fin and is situated above it. The lateral line is prominent and extends straight from head to tail. The spinous dorsal fin is placed above the pelvic fins and is normally retracted in a groove. The caudal fin is moderately forked with its posterior edged double-curved and is set at the end of a stout peduncle. The pectoral fins are placed low on the sides. Their swim bladder is large.