any of various large sharks of the genus Alopias, esp A. vulpinus, occurring in tropical and temperate seas: family Alopiidae. They have a very long whiplike tail with which they are thought to round up the small fish on which they feed
Examples of 'thresher shark' in a sentence
thresher shark
He said that he expected to see many more thresher sharks in the area, since commercial fishing of porbeagle sharks has ended.