I was alway told that you cannot put 2 betas together (regardless of sex).
My daughter had a beta (named Sushii) and we stood a mirror on the outside of the fish bowl. Sushi would then puff and flare up at the other beta (her reflection) which was so pretty and no harm done.
I found this link which may be helpful.
Good luck t.pettet
A dog wags his tail with his heart
Dogs have Masters--Cats have Staff
Rest in Peace Bailey: 12/10/95-1/9/09 (Golden Retriever)
Rest in Peace Kitty: 7/1/2000 - 10/7/2013
Gryphon (sounds like Griffin): 10-14-2004 (English Springer Spaniel)
Mollie: 6-2-2009 (English Setter)
Bella: LHD Cat adopted by/from Child