pygmy shark, Euprotomicrus bispinatus (c), showing jaws with upper and lower teeth; one of the smallest species of sharks; this specimen about 6 inches (15 cm) long; belongs to family Etmopteridae (lantern sharks) in order Squaliformes (dogfish sharks); pygmy sharks live in deep water by day (to at least 1300 ft) and may rise to surface at night, Kona, Hawaii (Central Pacific Ocean)