Home > Fishes > Sharks > Alopias pelagicus

Family Alopiidae

Thresher Sharks

Thresher sharks have the upper lobe of the caudal fin as long as the body.  It is used to help encircle and stun small fish & squid while feeding.  Typically found in the open ocean, often caught by tuna & swordfish longline boats and sold as bycatch.


Alopias pelagicus

Hawaii Institute of Marine Biology

Hawaii Institute of Marine Biology


Occupies surface waters of the open ocean.  Blue-black with a white belly.  Attains 11 feet.  Warm seas worldwide.