Originally Posted by mr_X
Yes. Also, in my experience, cardinals just sit there and do nothing. They are not the most fascinating fish in the sea. I would look into a trio of anthias.
+1 on the Anthias.
My trio exhibit some shoaling traits from the wild. They will get about mid-tank level on one side where the current flows from the bottom towards the top of the tank and just hang out. They will angle themselves downward into the current and sit almost motionless for 15-20 minutes at a time. When they do this in the wild, they are waiting for the current to carry food to them.
It's funny to watch my 2 clowns go and join in. The anthias are almost perfectly still and the clowns are doing their typical bob and weave. Looks like they are saying "what's going on.. what are we doing, huh, huh, huh". The clowns eventually give up after they get no movement out of the anthias.