katemn's Identifications

Cropped from my 2nd to last submitted image from this dive. Rather busy frame, but three Subject sea stars are present. One at low L, and 2 at upper R. Those 2 appear to be grazing on the sponge (a rather large 'finger 'sponge, upper base of).
Of possible interest is the almost but not quite identical morphologies of the 3 subject individuals. (Within the considerable limits of image quality, admittedly).
Tosia australis is regarded by some taxonomists as a species complex, for many reasons including the fact that no two specimens seem to have identical patterns and colours, and noting the very wide range of the species as it is currently classified (AFAIK).