A variety of snails (nassarius, mexican turbo, astrea, maybe a conch), cleaner shrimp, peppermint shrimp, anemone crabs, porcelain crabs, emerald crabs....DEATH TO HERMITS!!!!! I know that most people say that hermits should be a part of the clean up crew, but all of mine are snail murdering little $%#^!!! Seriously, we have spent well over $200 on snails that turned into nothing more than hermit meals and empty shells (if you are going to kill the snail, at least take their freaking shells!!!)