Anyone have an idea what the difference between these 2 little hitchhikers is? They seem to be identical as far as behavior (both can and will retract instantly if I move too quickly outside the tank, or if a fish comes near) and both have little tubes. But the one between my mushrooms seems more substantial. Just curious, they don’t seem to be harming either coral in any way...but perfect examples of why I didn’t want live rock in my tank! (Mushroom and Goni were both fragged on it, and I didn’t even have GHA at all until it came in on some zoas that had some on their LR frag)
