This is an unmistakable family as all species possess huge tails as long as the trunks. This large tail is used to herd schooling fish and then stun them with a whip of their tails. Their body is cylindrical and moderately stout. Their snout is pointed. Large pectoral fins are present. The first dorsal fin is large and erect, while the second one is minute. The pelvic fins are nearly as large as the first dorsal fin. 3 species are recognised with a circumglobal distribution in tropical and temperate waters. All species are large and strong swimmers. They possess an oviviviparous style of reproduction (aplacental viviparity) with intra-uterine cannibalism.
Typical species of the family of "Thresher sharks":