The translucent frosted nudibranch (Dirona albolineata) can have slightly different body colour variations between individuals which include cream, greyish-white, purple, or as in this photo a salmon colour. One consistent feature is a bright white line that edges the cerata, or flattened lobes extending from the back of this small animal. A white line also edges the frontal veil, and the tail end of the foot. As a response to stress, this nudibranch will shed its cerata. The frosted nudibranch can grow to 7 inches (18 cm) long, with a range that includes Japan, Siberia, and southern Alaska to southern California.