Bullock's Hypselodoris

Bullock's Hypselodoris (a.k.a. Bullockii Sea Slug) has several pale purple hues, from very pale whitish purple to purple, but never as dark as that found in a similar-looking nudibranch, the Hypselodoris apolegma. The color is uniform over the whole mantle, with a narrow band of white (or dark purple) at the mantle edge. The gills and rhinophores are yellow with purplish base or pale purple all over.