So my two clown fish have been getting along great for 3 days. Until about 5 minutes ago. They are both going at it nipping at each other, locking there mouths together swim and repeat. They were the only two clowns in the tank at the lfs and have been best friends until just now. They are about the same size as you can see in my tank build thread. Are they fighting for dominance or just hate each other all of a sudden?:frustrat: