Locally common in the Solitary Islands Marine Park. Found throughout the tropical Indo-West Pacific. In Australia known from southern Queensland and northern New South Wales.
Found inter-tidally to a depth of 18 m on gravelly edges of reef. Feeds on sponges.
A medium sized dorid with a mantle studded with numerous compound pustules. Colour is variable from brown to black with an irregular mid-dorsal cream line (sometimes almost absent). There are usually microscopic white spots covering the mantle, gills and rhinophores. Grows to 80 mm.
Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. p.168.
Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/tripinte. Accessed 16/07/18.