was scared this fellow would attack my shrimp, no issues there but he is attacking my royal gramma I BELIEVE but have not witnessed it. All I can say is since I have added him, the grammas fins are frayed a bit. but no other fish are affected. hes about 2 inches, eats everything from flake to frozen and is very cool. Free to a good home, wouldnt turn down a frag though. contact Kyle at 856-366-0620. Pickup only in 08106