[4_2_it]

Since you limped pre-flop, good fold. A raise really would have helped define your opponent's hands. If you only play JJ for set value you are giving up some EV. A pre-flop raise allows you to represent any paint that hits the flop. A queen or king high flop isn't as scary if put in a 4-5bb raise and follow up with a half pot continuation. Also, when you hit your set with JJ, many under pairs will stick around and pay off what they think is your 'AK'.

I will limp with JJ occasionally when I know I will get action, but against a 'super fish' I am raising this pre-flop 100% of the time.

Finally, while I think villain probably had a 7 in this case, I have seen fishy players with A [img]/images/graemlins/heart.gif[/img] 8 [img]/images/graemlins/heart.gif[/img] take a similar line trying to protect their hand.