We just put one in my sisters 40gal with an ex large A.
clarkii clown and 6 tiny
green chromis. Little Pyg is not the least bit scared of that clown which must be 10X its size! Pyg is charming and outgoing and so far has shown no overt aggressiveness. He/she does pick at everything in the tank, however, and I am sure this picking could become a real problem if, like Geoff said, it developes a taste for something you cherish. Ours is not in a full reef, only a bunch of recordia and some encrusting gorgo, star polyps and a finger leather -so far the pygmy hasn't bothered anything. Could be a differant story with tasty, clam on the menue!
