What cross tail this betta is?

[Aniket]

This was my first betta at that time i brought him as crowntail.but after few days i got he was not crowntail. But i thought he could be delta x crowntail.
What do you think about his fins?

 

[betta fish]

That's a combtail, usually the result of a crowntail and veiltail being bred together but yes you are right it is not a crowntail.