It has no ovipostor, so I too believe it to be a male.
I bought him at:
Fish Shack & Critters
1603 W 39th St
Kansas City, MO 64111
(816) 753-0687
www.fishshackandcritters.com
He was labeled as a "Round Tailed Betta" and I paid $4.80 for him. He was the only one they had.
