Placida cremoniana (Trinchese, 1893)
Possibly seasonally common in the Solitary Islands Marine Park. Disjunct distribution in the Mediterranean, Japan and Western Pacific region. On the east coast of Australia has been recorded as far south as Wollongong.
Known to feed on Derbesia, a genus of green filamentous algae. Depth range from intertidal to at least 20 m, and perhaps deeper depending on food source availability.
Commonly known as a Sacoglossan, this animal lives by ingesting the internal contents of algae. No studies have been done to compare species found in the Mediterranean and those in the Western Pacific region to determine if they are different. Grows to at least 25 mm, commonly smaller.
Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. p.64.
Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/stilcrem. Accessed 25/09/2018.