Aplysia argus (Ruppell and Leuckart, 1830)
Common throughout the Solitary Islands Marine Park. Found around the tropical coastline of Australia south to Albany Western Australia and Westernport in Victoria, and including Tasmania.
Frequents seagrass flats, reefs and sandy areas, to 15m depth. Commonly seen in coastal areas including rocky shelves and pools, rarely entering estuaries.
The most common of the larger sea hares, it grows to 250 mm length.
Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. p.49.