Probably the king betta because it's the largest and in most cases the larger the fish, the smarter
BETTA Fish i think
Betta
It is a kind of tropical fish.
He Revealed He Is Half Betta Fish.
Crowntail, Veitail, and Halfmoons.
Water
Betta, goldfish.ex.
fake plants my fish loves them
a male Betta will usually like the company of other fish but will fight or kill others of their kind also they might fight guppies cause they look similar to a female Betta.
It depends On its kind if turtle
Depends on what kind of fish you have, betta fish can have up to 150 eggs and only 90% are born.
You can try to put Guppy fish in with your Betta fish. That would be one of the only fish that i would put in with my Betta fish. I say that because i have a Betta male and he is OKAY with guppies. the first guppy i put in his died to to getting picked on by him but the others did not, so just give him another chance if you decide to get guppies. Hope i helped!