I'm not really into bettas either so I have no idea what variation or color type this is. I just know I didn't want to see him die in that cup. As long as he leaves my white clouds alone, he is welcome to stay in this setup. Just took him out of quarentine tonight.I’m not a betta guy so I could be wrong. He looks like what used to be know as a Mustard gas Betta.
Good looking betta either way.