Hi, I have a chromis ? If you would plz. I feel lucky to hv 5 healthy green chromis. Purchased 7 originally and I guess things just sorted out. If I purchased 5 yellow and black would it be all out war? The Y&B chromis hv a different body type so I was wondering...... plus would that move if successful starve all my other fish? They are like piranhas when it’s feeding time! Thanks