My ORA neon dottyback was about 1" when purchased and grew to about 3" over 4 to 5 months. He never bothered any of my corals or inverts, including 2 fairly large cleaners and a fire shrimp and a coral banded. I don't think he ever saw the 2 small pistol shrimp, but I was never fearful of that being a problem. He did start to pick on the smaller fish, though , so I ended up taking him back.