Hello all, I'm observing slightly disturbing behavior from my black clown goby. It has decided to perch on one of my acan colonies and I saw it do what appeared to be nipping at the colony. Should I be concerned? It obviously irritates the colony and makes it retract but when it opens I don't see obvious signs of damage. Any experiences out there? Is this going to escalate? I like the little guy but the acan is much more valuable than he is.