Ceratosoma brevicaudatum (Abraham, 1876)
Common throughout the Solitary Islands Marine Park. Endemic to temperate east and western coasts of Australia, from Perth across the south of the continent to northern New South Wales, and including Tasmania.
Frequents sea grass and reef, recorded feeding on an unidentified blue sponge. Depth to 120 m.
Colour basically pale orange but may vary from deep red to whitish yellow, always with red and purple spots, each with a lightish halo. A distinctive short, red, glandular lobe projects from the mantle edge behind the gills. Lays an egg ribbon with orange eggs, the larvae are planktotrophic, (feed on plankton). Common in the southern part of its range, grows to 120 mm but usually smaller.
Robert Burn, 2015. Museum Victoria Field Guides: Nudibranchs and related molluscs. Museum Victoria, Melbourne. p.120.
Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia.