Recently I noticed one of my orange guppys tail has almost been bitten in half and am not sure what has changed recently to start the tails getting picked on. My partner bought some blue and a black guppy yesterday and already one of them is missing a section of tail and the other blue one I think has a split in his. Is this guppies scrapping amongst each other or are my African butterfly's starting to attack them at night. From what research I did the butterfly's are pretty peaceful but they are the only other recent additions to the tank