The list is in order of aggression. Aimara being the most. From a post I saw earlier from you. The red/purple/white wolves would be under 12 inches and maybe something ur looking for. Out of the 3 the white seam wolf is most aggressive IMO. The others get more aggressive down the list.
As far as Malas, gold, and black wolves are concerned. The black wolf would be more aggressive b/w the 3 IMO. Some members have gold wolves here that would destroy anything you put in it but I think it maybe due to being from Argentina. I think they become more independent of groups etc....point is wolves from that area seem to be a bit more aggressive.
But look at the size of the fish and what u can house properly. I would hate to see u post it a fish in the marketplace for sale 9 months later.
Others here on the forum will have some good input like yuki, moe, Creni and DB etc. There are plenty of good people here to help.