I had one of these die to a vortech that goes off when i feed - it got inside to get some algae that was in the vortech and when the mp40 came on, it couldnt get out - i did see it a few minutes later, but it never recovered and died (it did swim away but i never saw it afterwards). So now I got another one - it will bite on rocks, even though there is no algae, it does it some of the frozen reef food i throw in, and it sometimes digs in the sand - I do know they dont need to eat alot, since lifestyle is stationary - mine seems fat but i never see it eat much, and never saw it eat in QT - it didnt lose weight for a couple of weeks.