Ophiodromus sp.
This is not nudibranch or sea slug

Photographed by: Wolfgang Krutz
| Kingdom: | Animalia |
| Phylum: | Annelida |
| Class: | Polychaeta |
| Order: | Aciculata |
| Family: | Hesionidae |
| Species: | Ophiodromus sp. |
Comment from Leslie Harris on photo #2402
I'm sure it's family Hesionidae and genus Ophiodromus. If you take a look at this image of the cold-water European species Ophiodromus flexosus you'll see the basic pigment pattern is quite similar. Locality: