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 20m, and perhaps deeper depending on food source availability.
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. Commonly known as a Sacoglossan, this animal lives by ingesting the internal contents of algae. Grows to at least 25mm, commonly smaller.