I have two peppermint shrimp in my 12 gal nano. They are going after my reef hermits. Literally pulling them out of their shells and devouring them. I had 12 hermits in there...and am now down to 8. I have seen them also try to pull out snails from their shells...but the snails seems to get away. What is going on here? Why would they be doing that? They eat some of the mysis shrimp I use to feed my clown pair. Shouldn't that be enough? Help!