In my experience, all crabs are opportunistic. They're going to try and eat every chance they get. If you're looking at your tank every day, and you believe you see any of your inhabitants becoming dominant in size or attitude. The best bet would be to trade the out for smaller more manageable animals. I personally try to stick with blue legged hermits in my reef aquariums because they are slower growing and still very effective at keeping nusance algea at bay.anyways i have to let go 2 ocelaris clownfishes ... leaving me with 2 clowns 3 tangs 1 foxface 1 royal hippo 1 six line wrasse and a yellow watchmen goby (which i might get rid off or bring to my lfs) ... anyways i have read few articles and i guess it's all up to me but what you guys of sally lightfoot crab and hermits...time and time they do bother my acans that i noticed and caused them to retract....sometimes my nems .....i do feed them daily and are getting big...more aggresive...what's your intake? return to lfs?