Hypselodoris bullocki, previously named Chromodoris bullocki, is often considered a species complex. Recently a colour variation has been named H. apolegma, but not all scientists agree in considering this latter a valid species.
The colour is pale pink to purple, with thin white marginal line, yellows gills and rhinophore with pink base.
Stand by and I'll double check the eating habits.
Hypselodoris bullocki is often mislabelled as a "reef safe herbivore" ideal for aquarium clean-up crews. Quite to the contrary, this
nudibranch is, like every true nudibranch ever discovered, a highly specific predator. There are several color morphs that each appear to feed on only one or two species of sponges.
Thomas