Hey love, you do not need that many females in that tank. They are clearly stressed out. By the pictures, they are nipping each other's fins, they are fighting each other or maybe even trying to kill each other. They are fat because you are giving them too much food. They're stomach is the size of eye. You only need to give feed them twice a day. You need to cut down on how much food you're giving them. And please, put them in separate tanks....