I know there's lots of posts on do emerald crabs eat zoas. Sounds hit or miss. I have 3 zoa frags. Just got an emerald crab and a purple dottyback. Ever since the zoas have looked like crap. The frags weren't glued down well and I keep finding them on the bottom of the tank and I have to pick them back up. Now one looks like it got part of it eaten. Is it the emerald crab? I also have 2 clownfish, 1 diamond goby, 4 hermit crabs, 1000 snails