Villain is a fish.
On the river I think that I block AT, KT, QT, JT, T9, T8.
I doubt that he is betting J8, J9, QJ or KJ on the river like this, because there was a risk that I could have the flush.
I doubt QK and Q8 called me 2 streets.
So I put him on the most clear hand which is the flush.
But is it possible that this villain make this pot donk as bluff sometimes or is this a good fold?
Against a fish I would call the river. Offcourse villain pot bet is really weird, but tough to give villain credit for a weird played straight or flush. I expect villain could over play some hands as well and with this in mind this could be a profitable call.
Cheers,
SDK1987
The xc xc dk line at the micro stakes is pretty much always the nuts.
I would have fold without read on Vilain. 
I also think, chances are big he got there on the river.
A part from that, I would raise the flop bigger, since there are many draws...
