Megamouth shark
Megachasma pelagios
| Length | Up to 18 ft |
| Description | Blackish brown on back and sides, creamy underside; large head and huge distending mouth; large fleshy tail; white-tipped pectoral fins |
| Food | Eats mostly pelagic crustaceans, some jellyfishes |
| Habitat | Presumed vertically migratory from about 40 to 80 ft at night and 400 to 640 ft during the day; extremely rare; discovered off O‘ahu in 1976. |