A good close-up pic would be the most helpful but I guess it hides in the rocks most of the time. It looks smooth and I suspect it's a ribbon worm (Nemertea). These tend to be predators on small motile inverts like other worms.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.