While I was feeding my fish a worm looking creature came out from under a pc
of live rock to get a pc
of shrimp. He is about the size of child's pinky. It is pretty fast. Came out to get food and went back under rock once one of the fish came by. Don't know where it came from or what it is. This is a fish only predator tank. 2 triggers, small puffer, harlequin tusk, yellow tang, and adult emperator angel. What could this creature be?