About three months ago i got two O. clownfish for my 36 gal, hoping they would pair up. One was real small when i bought it and the other was almost twice the size. so i thought the bigger one would become the female not long after i put them together. They have been fighting and nipping at each other ever since i got them and now I've noticed that there is a small slice of each of their tails missing, the bigger one is missing more than the small one. Is this normal, if they are still fighting, does that mean that they are pairing? i dont want them to tear each other apart. My other fish are a bicolor blenny and a yellow tail damsel.