|Maroon, peach, green, pink. Feather duster worms, growing downward, under the dock.|
|Pale green and blueberry "flowers".|
My Marine Life Encyclopedia has 49 pages of worms, almost 300 different species of marine worms in this area, including 8 species of feather duster worms, like these, from half an inch tall up to about 10 inches.
I'm not sure which species these are. The largest are about 6 to 8 inches tall, as far as I can tell without diving to measure them. The community may be a mixed grouping of the Split-branch feather duster (8 inches, solid colour plume), the Vancouver feather duster (10 inches, banded crown) or the polymorph feather duster (7 inches, variable crown); and the whole bunch of them have tiny eyes, looking back at me.