This stunning nudibranch is a favourite of photographers, not only because of its ghostly, transparent qualities, but because its shape is ever changing and its cerata catch the light in ways few other species do.  It can be quite a common sight in the later winter months.  I have seen as many as 20 gathered in the intertidal zone (in preparation for mating?). The only other “look-alike” I have found in the shallow waters of the Salish Seas is this beauty, the Golden or Orange Dirona,  Dirona pellucida.