Red cup worm (Myxicola infundibulum)
Myxicola infundibulum; the red cup worm. Taken at a low spring tide - as with most fan worms they need to be carefully approached if you want to see it in close up.

Myxicola infundibulum; the red cup worm. Taken at a low spring tide - as with most fan worms they need to be carefully approached if you want to see it in close up.