I have betta rubra offspring! Although, not from my efforts of moving the holding male to an isolation tank. 🤣
So far I have 3 very juvenile betta rubra in the main 15 gallon where the female is housed.
My own efforts haven't been a total waste as I did see 1 fry in the isolation tank where I recently moved a holding male. Not really sure if I should be seeing more fry at this point. The male definitely has the appearance that he is holding something still.