Worm starfish thing?

[LucasJ]

Any ideas what this is

 

[Townes_Van_Camp]

Looks like part of a serpent star to me. They can and do regenerate limbs. Iirc it only requires a portion of the mouth/disc to survive and regenerate.

Quite a pretty pattern on it as well.

 

[BristleWormHater]

Any ideas what this is

Micro brittle star good cleanup crew