Trinchesia #9 (Ihering, 1879)
Possibly common in the Solitary Islands Marine Park. Recorded from Japan and the Great Barrier Reef in Queensland.
Found and thought to feed on hydroids. Depth to at least 21 m.
Specimen in photograph 12 mm in length.
Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. p.286.