Name:  558586_418596734831179_182200265137495_1404075_1402619216_n.jpg
Views: 1646
Size:  68.1 KB<---Did a quick search for mollusks of the Oregon Coast and got a hit on the second link. I then did an image search and sure enough...it's called a gooseneck barnacle. They spend their life attached to rocks and tend to live in clusters together with mussels.