Just started my tank this past monday, have some weird looking thing inside the live rock still ting to figure out what it is lol. At night it's out like that during the day it's inside the hole any ideas what that is?
While I'm not aware of the name I have had plenty in my aquariums over the years. They can cause trouble for nearby corals. I would cover the hole with glue or putty to prevent it from bothering corals.
