Could be a plakat male but looks more like a female
More than 10 years
It's a female Crowntail.
I have to agree that it looks like a female to me. I also purchased a "baby boy" a little over 2 weeks ago but I am starting to think it's a baby girl instead. I've kept many bettas over the years but this is the first time I've decided to raise one from a baby. It will be an interesting experience (already has been). Good luck with yours! She is very pretty!