Distribution: Uncommon in the Solitary Islands Marine Park. Recorded from Indonesia, Hong Kong and the South China Sea. In Australia recorded from Shark Bay in Western Australia, the Northern Territory, the Sunshine Coast in Queensland south to Sydney in New South Wales.

Ecological Notes: Found in rock pools and rocky reef. Feeds on sponges including Dictyodendrilla sp. Depth to 35 m.

Additional Notes: The mantle has a purple border of irregular width, inside this is a broad white region with many bright yellow and purple spots. The remainder of the dorsal surface is coloured a translucent reddish or orange/brown, extending from in front of the rhinophores to just behind the gills. The foot is white with bright yellow spots.  Grows to 70 mm.

References: Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. pp. 133-4.

Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/chrocoll. Accessed 03/08/18.

Atlas of Living Australia at https://bie.ala.org.au/search?q=goniobranchus+collingwoodi. Accessed 22/01/2019.