How big can a thresher get?
Thresher shark
Alopias pelagicus H. Nakamura, 1935 (pelagic thresher)
Alopias superciliosus R. T. Lowe, 1841 (bigeye thresher)
Alopias vulpinus Bonnaterre, 1788 (common thresher)
Alopias grandis (extinct)