We have a few hands on villain and he is a fish.

What kinds of hands does the fish donk here?

What's a rough range villain would 2barrel here?

The reason I bet here was to get value from Kx kind of hands. I don't know though if villain has those often enough. He bet pot bet at turn which makes me feel like he may not have them often in his range. I am not sure though. I think it's better to check here. I feel like this checking range on river consists of bluffs he gave up with the club or sd draws and also Aces. I think he has kings not often. As arough percentage I would say sth like 5%(or even less) of his checking range is Kings. I don't see the reason to value bet here. It's too thin imo. However if he often has Kings here, this changes completely. I don't know if that's the case and that's why I ask this.