I have a 55 gal. tank, i have two angelfish one male, one female. My male chases the female around the tank on occasion, going after it like it is going to nip it but never really gets close to biting it. female usually stays away but the male will see her across the tank and go after. Could they be playing or is he just looking for some action that she does not want to give. The angel is fine with all my other fish, corys, neons, mollys, and serpaes. What should i do?