Pleurobranchus mamillatus
Quoy & Gaimard, 1832

Family: Pleurobranchidae


Indo-West Pacific.


Rabaraba, Papua New Guinea, on a sandy bottom in about 70 feet of water. PHOTO: Ray Izumi.

This pleurobranch is similar in shape and colour to the Mediterranean species Pleurobranchus testudinarius (Cantraine, 1841). It is large and tuberculate, often with bright pink or yellow rings encircling the base of each tubercule. It has seldom been reported since Quoy & Gaimard's first report from Mauritius. It has been found in New Caledonia (personal observations), New South Wales, Australia (Allan, 1957), [and possibly from the Great Barrier Reef (Kenny, 1970) and southern Africa (MacNae, 1962)]. It has also been recorded from Kerama Islands, southern Japan as P. grandis by Atsushi Ono (1999).

• Quoy, J.R. & Gaimard, J.P. (1832). Voyages de découvertes de l`Astrolabe pendant les annees 1826-1829 sous le commandement de M.J. Dumont d`Urville. Zoologie, 2: 1-686.

Authorship details
Rudman, W.B., 2000 (April 30) Pleurobranchus mamillatus Quoy & Gaimard, 1832. [In] Sea Slug Forum. Australian Museum, Sydney. Available from

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