I had a nice rock full of 100+ eagle eyes and watched them slowly diminish. I wasn't sure what the problem was because everything else in the tank including other zoas look fine. Then I saw my yellow tang grazing on what I thought was algae on the rock but upon further inspection he was actually eating the zoas. He is fed daily and given nori as well. How can I stop this? Hoping he don't get a taste for palys as well. Has anyone else had this problem? Can it be stopped? Thanks.