Hi can anyone help me to identify what this is in my tank, if anything to be worried about and if/how to remove them? They have spread to several rocks and also areas in the sand. As soon as I go near them they retract back into rock. Some types of spaghetti or spionid worm??
They are spreading quite a bit. They are quite thick and long strands/tentacles.
They are spreading quite a bit. They are quite thick and long strands/tentacles.