Unknown marine worm, colourful and on the upper shoreline.
No identification made yet.
No interactions present.
It would be great to name this specimen BUT to do this you need to see the head and ideally details of the legs (parapodia); the tail as shown in the image doesn't really help. All I can tell for certain is that the specimen is likely to be mobile. How long was it ?
Never mind! It was about 3cm long, though its length would vary a lot? I have no idea even what kind of age this is! Do they go through stages?
That narrows it down a bit; but not much. Oddly, it looked bigger in the picture. Its probably a ragworm of some sort (Nereidae) but there are a couple of Hesionid species that might look a bit like this. Sorry I can't do better
The picture is pretty zoomed in. No worries about not getting it down further, i didn't have a clue to start with so it's an improvement!
Just noticed I forgot to comment on ages/size. They usually settle from the plankton at 0.2mm to 0.3mm. How much they grow depends on the species. I have seen museum specimens of Nereis virens > 60cm. There are more than 8000 species of polychete worm so its difficult to make broad generalisations.
Lat/Lng: 54.1, -2.9
OS grid ref: SD4575