Phyllidiella pustulosa (Cuvier, 1804)
Common in the Solitary Islands Marine Park. Distributed throughout the tropical Indo-Pacific generally. In Australia found from Perth in Western Australia around the tropical north to northern New South Wales.
Usually found on food source (may be Tetilla sp. sponge), to a depth of at least 15 m.
Marked colour variations, may vary from pink through to grey/blue. Tubercules in groups of three, black rhinophores and the pink edge to the foot are indicators of species. Exudes a toxic milky secretion as a defence mechanism if disturbed. A very common nudibranch, grows to at least 60 mm.
Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. pp.259-60.
Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/phylpust. Accessed 25/09/2018.