Distribution: Common in the Solitary Islands Marine Park. Known from south eastern Australia, from southern Queensland to western Victoria and including Tasmania.

Ecological Notes: Frequents rocky reef areas. Feeds on a range of pink and yellow sponges in the family Darwinellidae, especially Darwinella rosea. Depth from intertidal to at least 12 m.

Additional Notes: There appears to be three colour variations according to geographic location. In New South Wales the body colour is white or pink with small scattered red or orange spots. Gills and rhinophores match the body colour and there is a red or orange mark on the anterior edge of the rhinophore club. There may be a bright yellow or orange edge to the mantle, sometimes faint or absent, especially in juveniles. Grows to 17 mm. 

References: Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. p.157.

Robert Burn, 2015. Museum Victoria Field Guides: Nudibranchs and related molluscs. Museum Victoria, Melbourne. p.128.

Atlas of Living Australia website at http://www.seaslugforum.net/find/noumhali1. Accessed 08/09/2018.