Villian runs 61/3.45/0.45 over 116 hands.

I flop top pair weak kicker and a dangerous straight draw or possibly already behind. I decided to cbet to take the pot. He calls.

Turn completes some straight draws so i decide to check for pot control. He minbets and i obviously call.

He instapushes the river when i river a set.

I am ahead of 2 pair's, behind if he holds AJ AQ, behind if he hit his straight draw?

Is it correct to fold here? Since he is a total fish.

Full Tilt Poker $0.10/$0.25 No Limit Hold'em - 6 players
The Official 2+2 Hand Converter Powered By DeucesCracked.com

SB: $26.60
Hero (BB): $25.00
UTG: $25.90
MP: $90.45
CO: $15.65
BTN: $14.35

Pre Flop: Hero is BB with A 6
3 folds, BTN calls $0.25, 1 fold, Hero raises to $1.25, BTN calls $1

Flop: ($2.60) A J Q (2 players)
Hero bets $2, BTN calls $2

Turn: ($6.60) 9 (2 players)
Hero checks, BTN bets $0.25, Hero calls $0.25

River: ($7.10) A (2 players)
Hero checks, BTN bets $10.85 all in, Hero ???

1. Don´t raise pf, A6o is really way off what is a good raising hand oop.
2. The turn didn´t really complete any draws except a really unlikely 8T. If he peeled with a gutshot and hit, he could peel the flop with so many other random holding so that wouldn´t really be my first thing to worry about.
3. Unless you have actually seen him randomly shove his stack in the middle before, I think your first instinct should be that he is doing this for value and there is a gazilion hands that beat you so easy fold.

Why are you raising A6o from the BB?