dominate mollies fighting how to stop

Question
ok i just got a new yellow molly and a black spotted Mable molly i have seems to be poking at it and i'm worried this may kill the yellow one should i return the yellow one?

Answer
Joe,
If the tank is over populated this will happen. Since you have added new fish, everyone is staking their claim to the territory. If it does not calm down in a few days, or things get worse, remove the one being picked on and place it in your hospital tank. If it gets too bad, then I would return the fish to the store.