Eudistylia vancouveri (Northern Feather Duster Worm), Schizobranchia insignis (Split-branch Feather Duster Worm)

The Burgundy and dark grey worms are Northern / Vancouver Feather Duster Worm (Eudistylia vancouveri). If you look at the ends of the radioles (feathers), there aren't branches. The solid colour feature duster worms are Split-branch Feather Duster Worm (Schizobranchia insignis). You can see the split-branches at the end of the radioles (feathers). There aren't calcium tubes here which rules out some other species.