Onchidella nigricans is a species of small, air-breathing sea slug, a shell-less marine pulmonate gastropod mollusc in the family Onchidiidae.
Distribution This species occurs in New Zealand, as well as on the coast of south-eastern Australia, where it is common.Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979
Feeding O. nigricans is a general herbivore feeding on algae. It also consumes zooplankton.
Habitat This species can be found in the intertidal zone on a variety of habitats.
References
Further reading
Miller M & Batt G, Reef and Beach Life of New Zealand, William Collins (New Zealand) Ltd, Auckland, New Zealand 1973