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Unlike sea slugs, they are relatives of the land slugs, belonging to the airbreathing infraclass Pulmonata, order Systellommatophora Pilsbry, 1948.
They may be distinguished from sea slugs by their eyes, which are on the tips of their cephalic tentacles, in sea slugs they are embedded in the skin.
There are only a few pictures of the family Onchidiidae online, 1 species from Hawaii, one species from the Philippines and 6 species from Singapore, and 1 species from South Africa.
How to cite:
Köhler, E. (2016), published 18 February 2017, Onchidiidae sp. Family: Rafinesque, 1815
available from https://www.Philippine-Sea-Slugs.com/Look-alike/Onchidiidae/Onchidiidae.htm