Villain is LAG fish. steals 46% IP and folds to 3bet about 33%, 140 hands

WPN, $12 Buy-in (10/20 blinds) No Limit Hold'em Tournament, 2 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

Hero (BB): 410 (20.5 bb)
SB: 590 (29.5 bb)

Preflop: Hero is BB with K J
SB raises to 40, Hero calls 20

Given the stats, I think 3bet-shove is a better line
 

Flop: (80) 9 T 4 (2 players)
Hero checks, SB bets 20, Hero calls 20

I don't like my call here anymore. My new line would be checkraisig big because vs fish I think a small bet like this is a weak hand and I'd like to get him off of flushdraws and low pairs. I think I'd reraise to 120.
 

Turn: (120) 5 (2 players)
Hero checks, SB checks

River: (120) 8 (2 players)
Hero bets 80, SB folds

On the river I think that all pairs will check behind and I'm defeat. All busted draws are willing to barrel I guess so I took my chance and bluff for my self since I block a J to the straight and it fits to my passive previous played streets
 

Results: 120 pot
Final Board: 9 T 4 5 8
Hero mucked K J and won 120 (60 net)
SB mucked and lost (-60 net)