2 weeks ago I got 2 bangaii cardinals. One is doing amazing while the other has been acting and looking a bit odd. He eats like a champ but doesn't swim around much and spends most of the day hiding (coming out for food). A couple of times I've actually found him kind of just sitting up against my pump/filter and then when I came to see if he was alive he swam back under the rocks. I apologize for the bad picture quality, its the best I could get. Basically, he looks quite a bit browner than the other bangaii