I have a lunar wrasse and I'll tell you he is very active. Rarely is he in hiding. It is considered a predator fish and will likely pick on crabs (hermits included). I have in my try tank a blue damsel ( about an inch and a half) a foxface (about 4 inches) and a niger trigger (about 5 inches) and all of them get along great. Aside from inverts, I would imagine it would do great with your tankards.