Scratch that...went ahead and bought an emerald crab from the seahorse aq supply $8...if he's a naughty crab they said i could take him back and return him. I'm just worried about getting one that will destroy my reef, because i know they are opportunistic feeders...wasn't really super excited about putting any crabs in the tank, but I also don't want it full of bubble algae. we'll see how it goes