And of course to make things more confusing there is polymnus ( saddle back) color morph that has like three white bars and white edge around tail fin. (two full bars and one more at small of tail and then white edging around end of tail.) Something like that anyways. Ive seen four colors in the A. Polymnus. But if your fish has start of white band at tail that fades into all white tail, and gold fins outlined in black except for on back , then thats why i would say clarki. no yellow tail and no saddle . I too think they are all great fish.