Comments : I do not note these nudibranchs often in Puget Sound, however they were very common at Sea Mount in Hood's Canal. The beauty of diving in Washington State is that there are some huge diversities between Hood's Canal, Puget Sound, the Strait of Juan de Fuca, and the San Juans, all of which are within a day's reach. This nudibranch grows to about 2 inches long and feeds primarily on sponges, which are very abundant at Sea Mount.