Ceratosoma tenue (Abraham, 1876)
Moderately rare but found throughout the Solitary Islands Marine Park. Widespread throughout tropical western Pacific and Indian Oceans. In Australia recorded from Queensland south to northern New South Wales, Lord Howe and Norfolk Islands. Also North West Shelf off Western Australia.
Found on reef edges to a depth of 30m. Feeds on sponges.
May be coloured red to brown, there is a distinctive tall appendage behind the gills. There are two pair of flat lateral body lobes joined by a ridge outlined with a broken purple line. Grows to 120mm.