So, I happened to see this little thing tucked under the ledge of a rock. Watched it for days and it never moved from the immediate area, was partly in a shell for a few days, then on the sand. Thought it may have been a or part of a bristle worm due to coloring and the shape. I finally got it out of the nook it was in and it was roughly half the size of a dime. I put it on a rock higher up thinking it would just be there considering it hadn't moved from the spot it was in. Well, it's mobile and it noped out of that spot quick and I've lost it in the tank. Stupid me should have stuck it in something so I could get better pics and an ID. I've searched and searched to no avail. Maybe someone here knows? So sorry for the pic quality, I know it sucks.
