My mean dovii who was a sollo in a 55 gallon tank for a couple weeks, was very scared and frightened of me, so I bought a red devil for some company for him well they are both 3 inches and they got into a fight they were lip locking and biting each other. The dovii is still the leader but the side of his lip is swollen from lip locking, it doesn't look bad just a little white. Will it heal? Please Reply I have to know!!