My multi colored crowntail male and female beta are in a tank separated by a clear divider. They usually ignore each other, but the female started showing vertical stripes and the male then started getting very showy to her through the glass (Occasional flaring and doing the *mating dance*). He seemed interested, but was not building his bubble nest.
So, for an experiment I let the female loose in the males tank under supervision for a short period of time. I read that sometimes the male prefers to make the bubble nest as the eggs are spawned, so I decided to test that theory.
So far, they have played tag and danced together, no apparent fighting. They have mated around 5 times, but the female does not appear to be spawning any eggs, nor is the male collecting anything. The female has been hanging out up top with the male and appears to want to mate, so I'm not sure why she's not spawning. They have been doing this for the last thirty minutes where they will swim around and mate/dance with each other when they meet up, but no eggs.