Agree with that. Mutually excusive. Not sure if they were involved in breeding at all. .
Someone was correct the other day by saying the roosters they had have to be kept separated because they will naturally fight each other. That is why the overhead pictures show a little spot for each rooster with the ground worn down for that rooster.
Its similar to the fighting fish you sometimes see at fish stores and some people buy a single one.
They needed to keep them separated.
I just learned something new about these fish though. My goodness. Us humans will bet on anything. Ugggg.
"The common name, Siamese Fighting Fish, was coined due to the practice of organized fights between males, much like *advertiser censored* fights. These matches continue to this day, driven by the income from betting."
"Males cannot be kept with together, unless there are separators in the tank"
http://freshaquarium.about.com/cs/anabantids2/p/betta.htm