OK!! I have 3 parrot fish, (The red parrot fish) but they are biting each other... SO IF YOU PLEASE HELP me what do I have to do? Only one is biting the 2, and the other 2 is not biting at all,

I don't know whats going on, are they kissing? Biting? Fighting? I don't know, but I am soo afraid if one of them is injured as I don't know if one of the parrot fish came up like this, it has a very red color in her body above, just like this one but mine are not exactly the same as them, they are circled and cute looking
http://www.fishlinkworldwide.com/fis...art-parrot.jpg
Did you see one of them has a very red color above? IS my parrot fish injured because of other fish is biting her?

What do I have to do? Is it normal? Do I have to keep them like this? Or do I have to act, I don't think that the parrot fish injure, their mouth is very soft, I also have a Mollie fish with them, they are 5, but the parrot which is biting also follow them and tried to bite them...
The 2 other fish are not biting them at all and not attacking the one who caused trouble (WISH THEY DO)
Please tell me what to do? And thanks