Tidepool Tim says,  “White dorids are infrequent. Sometimes we see them on lobster traps and sometimes only on rocks in the inter-tidal areas. They are a very small, frail and delicate creature. No idea how they spawn or feed. If you look closely on their backs you will see a veil of tiny bumps or papillae. These must be used for protection or for digestion purposes. They too have antennas and a gill ring on their dorsal side. They make great aquarium specimens as they like to cling to the glass and be seen.”