Habitat
This species occurs in New Zealand, as well as on the coast of south-eastern Australia, where it is common.

Onchidella nigricans, (Quoy & Gaimard, 1832)
Onchidella nigricans is a species of small, air-breathing sea slug, a shell-less marine pulmonate gastropod mollusc in the family Onchidiidae.
This species occurs in New Zealand, as well as on the coast of south-eastern Australia, where it is common.
O. nigricans is a general herbivore feeding on algae. It also consumes zooplankton.
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