I aggree with VictorP, in addition he's also a RT. an HM needs to have a flat tail and smooth edging, no ray's sticking out or anything like that so that would be a fault on him as well as the irid because it's in random splotches on his tail and not all the way around on his fins. If the irid went through his dorsal and anal as well, it might be a slightly different story but I believe that is also a fault on color.
Hard to tell from the picture but it looks like his ventral fins might be a little on the stubby side? If they are the same length as his anal fin he should be just fine but his anal fin is also extremely heavy, finnage wise. Now I'm not sure how much of a fault that is or anything but I don't think it's too bad.
But some good things is that his fins all meet which is excellent! And they're all relatively the same length which is fantastic and his topline isn't terrible. I believe his body:finnage ratio is quite nice as well but I'm not as experienced in that yet.
Rembrandt II, Suiché
Leopards: 1:4 Hawkeye, Luna, Astrael, Dorian, Cullen
Gargoyle: Cloudjumper and Toothless