I've seen it done, but I will admit I've never seen them coexisting together once the banggai is a mature adult. I've known many a banggai to prey upon small (and even rather large) shrimp. If he doesn't eventually make a snack of them, just know he has full potential to at any given moment, given the size of his mouth and his natural prey items. Out of all of the more common cardinals available to us, the only 2 species I would feel totally comfortable keeping in a community of mainly nano (1-2") sized fish and tiny mobile inverts, would be longspine/ghost cardinals (Zoramia leptacantha) and the red spot cardinals (Apogon parvulus). I'd pass, but it's up to you :bum: