Absolute Poker No-Limit Hold'em, $0.50 BB (5 handed) Converter Tool from (Format: Bet The Pot)

BB ($20)
UTG ($19.70)
Hero ($61.05)
Button ($35.85)
SB ($28.45)

Preflop: Hero is MP with , .
1 fold, Hero raises to $2, Button calls $2, 2 folds.

Flop: ($4.75) , , (2 players)
Hero bets $4, Button calls $4.

Turn: ($12.75) (2 players)
Hero bets $9.5, Button raises to $29

HERO?

i think it depends on villain, if he's coming along a lot and could be playing sembluff like that for example JT, KJ, QJ or a pure bluff there then it's closer and might be marginally +EV to call as you get 2:1 for a call and you have about 37 equity vs such a range (including 88 set, KQ, KTs, J9s but not AJ)
if you dont think those hands are in his range i'll prefer a fold, but that's just me and i'm generally weaktight

He is a fish based purely on observation. No stats.

If your feelings are he's a fish which is likely the case then I think you can curse and pitch it. As much as we've all tried to sell ourselves on the idea that "he's making a move on me" it's likely not the case. Fish + micros + suddenly waking up = they're not bluffing.

Other than the 5 times out of 100 or so where you find someone getting cute but with a little discipline this is a fold I think.