Molluscs moonsnail Moonsnail egg case with Ulva sea lettuce eggs from Nucella (gastropod frilled dogwinkle) geoduck siphon an a bed of Ulva and sea noodle butter clam and heart cockle (right screen) heart cockle bent-nose macoma with moonsnail drill hole Blue mussels (top), limpets (center), Little brown barnacle (lower right) Woody chiton Opalescent nudubranch (gastropod) on sugar kelp Opalescent nudibranch