Heh, there must be hundreds of species. Get a coral banded shrimp to eat his friends. If you found one, there must me more in there. A wrasse will also work, but they only eat what will fit in their mouths. A shrimp will chew anything. In the long run, you could get both, a 6-line wrasse and a pair of coral banded shrimps. Make sure you get a male and female, they do not look alike.