Do I have to call the river?

[Silly String]

Just another fisherman catching one on me, or should I know to fold this to a river value bet? My only read is the opponent likes to slow play monster hands.

PokerStars: Hold'em No Limit ($0.10/$0.25)
Table 'Rana' Seat #6 is the button
Seat 1: captn bukfst ($41.15 in chips)
Seat 2: Shazmeister ($7.95 in chips)
Seat 3: Stretch69 ($9.25 in chips)
Seat 4: SillyString ($25.55 in chips)
Seat 5: IckeyMouse ($24.65 in chips)
Seat 6: luckyspirit ($53.10 in chips)
Seat 7: me_pud ($12.85 in chips)
Seat 8: GTBobby ($8.90 in chips)
Seat 9: Osterskog ($21.60 in chips)
me_pud: posts small blind $0.10
GTBobby: posts big blind $0.25
*** HOLE CARDS ***
Dealt to SillyString Q J
Osterskog: calls $0.25
captn bukfst: calls $0.25
Shazmeister: calls $0.25
Stretch69: folds
SillyString: calls $0.25
IckeyMouse: folds
luckyspirit: calls $0.25
me_pud: calls $0.15
GTBobby: checks
*** FLOP *** J 4 J
me_pud: checks
GTBobby: checks
Osterskog: checks
captn bukfst: checks
Shazmeister: checks
SillyString: bets $1.75
luckyspirit: folds
me_pud: folds
GTBobby: folds
Osterskog: folds
captn bukfst: calls $1.75
Shazmeister: folds
*** TURN *** J 4 J 6
captn bukfst: checks
SillyString: bets $4
captn bukfst: calls $4
*** RIVER *** J 4 J 6 5
captn bukfst: bets $6
SillyString: calls $6
*** SHOW DOWN ***
captn bukfst: shows A 9 (a flush, Ace high)
SillyString: mucks hand
captn bukfst collected $24.05 from pot

[DaHorror]

Maybe bet more on the turn. Looks like he was calling you anyway. Rather stupid call by him on a paired board. Just a fish drawing out on you. Pretty easy crying call on the river too. Nothing wrong with your play really.

[mxiu]

Bet the turn more for sure. Make him pay for his last spade if he's really fishy enough to go for it. $6 on the river was a decent value bet by the opp, not really worth calling if it were any more.