Bigeye thresher shark
Alopias superciliosus
| Length | Up to 16 ft, generally under 13 ft |
| Description | Very long tail, almost as long as rest of body; violet-gray dorsally becoming lighter on sides; distinctive v-shaped groove on top of head gives helmet-like appearance |
| Food | Eats squid and bony fishes; stuns prey with tail before feeding |
| Habitat | Pelagic waters and at deep bottom areas, from the surface to depths of over 1,600 ft |
| Reproduction | Aplacental vivipary, embryos feed on eggs in uterus after using up yolk sac; litter size normally 2; size at maturity 9 ft (9-10 yrs) for males, 11 ft (12-13 yrs) for females |
