Characteristic orange colouration on inside of gills visible in this photo.
Moderately common in the Solitary Islands Marine Park. Found throughout the temperate waters of southern Australia, from New South Wales to Western Australia, southern Queensland, and New Zealand.
Intertidal, under stones to a depth of 55 m. Feeds on sponges.
Wide colour variation with body colouring varying from light yellow to reddish brown. Numerous pustules (brown with a white ring at the base) dot the mantle. Characteristically darker banding in the centre usually devoid of pustules. Grows to about 40 mm.
Robert Burn, 2015. Museum Victoria Field Guides: Nudibranchs and related molluscs. Museum Victoria, Melbourne. p.138.
Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/hoplnodu. Accessed 24/09/2018.