Do you not use any type of crabs for your CuC? What does your current CuC consist of?Caught an emerald crab (definitely an emerald) eating on my top right tenuis colony in the dark. He was strong. I forgot how strong those little devils are. But he was not not as strong as my stainless steel tweezers. He is no longer with us. I have a zero tolerance policy with things that eat my acros. I was wondering what all the odd melanurus behavior was about and how he was peeking into the corals. I thought he was scoping out polyps, but I never saw him touch a coral. He was stalking the crab through the tank I bet and going crazy. I wonder if that's the only one. The rest of the corals seem happy and are indeed empty. My tenuis wasn't extending its polyps, so my guess is that this crab came in hiding inside a colony, went loose in the tank and got busted by me! Getting a crab out of an acro colony is a PITA. Don't trust those things...they're little pieces of crap just like all their other ugly friends.
Now my tenuis can chill out and be happy. Man, I hate those things...ultimately my fault for not catching him from the getgo, but it's all good. I got him.