Thresher / Foxtail Shark (Alopias vulpinus). Distribution: Eastern & Western Atlantic / Central Pacific / Indo-west Pacific. Usually lives at depths over 200m & only sighted rarely - The Common Thresher Shark ranges in size from 16.5 to 20ft long - Feeds on Squid & Fish corraling them with its elongated tail / stunning them with slaps from it and catching them with its very sharp but small teeth - Decreasing in numbers because of overfishing (it is hunted for meat and its fins).