Piddock Clam (Penitella penita) Typical size: 2” diameter siphon. ID: Large siphon with brown and white markings. Comments: An extended siphon is all I every see of the piddock clam. This species is very common throughout Northwest waters around clay walls or soft substrates. Some of the clay walls around Point Defiance have so many holes drilled by piddock clams that the wall looks like Swiss cheese
This sea cucumber has its feeding tentacles extended. After sea cucumbers catch food this way, they stuff their tentacles into their mouths. See a marine animal also known as a "white-spotted rose" next.