there is only 2 bettas in there..one is jasper [with some guppies and rummy nose tetras] and the other is alucard [i have to keep him in a large breeding trap because a big tank terrifies him! the rest have their own tanks
my new fella was in a breeder whilst i had a re-arrange!
Difficult to say whether he's a super-delta or a halfmoon without a flare shot. Judging by the way the edges of the caudal curve outwards, i'd guess HM. Definately not a Double tail
Bae1994 - the guppies are more likely to rip the bettas tail. Either way not a good mix.
Yours look just like this betta in terms of finnage [not colour]
which btw, is a half moon
Apart from the ends of some of his fins which look a bit crowntailish