Flop is not a typical bluffing spot for bad villains. To minraise ace high flop is a slap in the face to the pre flop raiser. He could be overplaying a worse pair though. Or maybe this is just what he does with a flush draw... click it back.

Turn checks through, if he has a set or weak flush he really should be betting for value because another heart kills the action. Fish tend to realise this. Although a set might want to see if he can boat up, fish also do this. I feel like he's polarised when he checks here after raising flop, he's either weak or he has a set or the nut flush.

River bet is weird. Not sure if he's trying to get maximum value off AK/KK or trying to get folds from QQ and down. This once again feels like a slap in the face... this river is much better for our range than his.

idk, this is kinda weird, it doesn't make a lot of sense, and often that's because it's a bad bluff. And fish can definitely make bad bluffs at pot size on river. He could have stone cold bluffed the flop to try and fold out missed pockets, check the turn with the nut flush draw, and slam in a pot size river bluff with the nut blocker. That's a possibility. But also it could also be because fish can play strong value hands like clowns. He might just have the nuts. I think I'm calling this river and I'm definitely taking notes whatever he turns over.