Two Male Swordtails
So I have two male swordtails that, for whatever reason, started fighting with each other today. They will swim at each other, trying to bite one another I think. They will go at it for a little bit, chase each others tail in circles, chase one another across the tank, and then go their separate ways and rest. Then one comes back for more, and it starts again.
I have had them together for a month and a half with no problems. There are also 4 other female swordtails in with them. Does any know if this will cause any harm to either?