Sponge-headed cat shark
Apristurus spongiceps
| Length | Up to 1.6 ft or more |
| Description | Dark brown body; thick body and head, grooves and pleats around gill slits and throat |
| Food | Uncertain |
| Habitat | Extremely rare; known for many years from only 2 specimens: one taken from Hawaii at 1,900 ft, the other from the Banda Sea at 4,800 ft |
| Reproduction | Ovipary; only egg-laying shark in Hawaiian waters; litter size and size at maturity unknown. |
