[tang daddy]

As mentioned before the yellow canary would deal with snails, even better a melanarus wrasse will wipe out the snail population in great time, any crabs that venture out will be smacked against the rocks and eaten, great thing is when you want to catch the wrasse it takes 2 mins as they are fearless and love food. Just shove a piece of shrimp tied to a rock in a Fish trap and done!