Plocamopherus imperialis (Angas, 1864)
Uncommon to rare in the Solitary Islands Marine Park. Known from temperate south eastern Australian waters and New Zealand.
Recorded from intertidal and sub-tidal waters to a depth of at least 10 m. Thought to feed on arborescent bryozoans.
Recognised by the orange or reddish body with brown or black speckles. The tail of the animal is pointed and flattens into a paddle shape when the animal "swims". Species of Plocamopherus have a series of large compound papillae arising from the oral veil and the sides of the mantle. Some of these papillae often have a large bulb at the tip, which, when the animal is disturbed, luminesce, producing flashes of light. Grows to 100 mm in length.
Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. p.271.
Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/plocimpe. Accessed 26/09/2018