NYC, can you post any links to articles suggesting that they will interbreed? Everything I have read states that they will not. Not entirely sure if this is directly applicable to the pictas, but I was extremely surprised at how incredibly agressive the micropoecilia parae are. Even the females are extremely scrappy, and it took less than a week for the dominant male to dispatch of the other male, even in a very sparsely populated and heavily planted 29. Apparently with these species, the key to success is a very female heavy sex ratio, which can be hard to accomplish since they are mostly sold in pairs.