I spotted a worm swimming about in circles last night a minute after the lights went out. I couldn't get my camera in time but curious if anyone can suggest a few places or pics to help me ID it? It was under 2", round and a beige/cream color with point at least one pointed end. The ends were a slightly different shade. It swam in circles for a minute then retired to an empty shell on the sand bed. By the time I got my phone to snap a pic, it was gone.