I don't have lot of reads on this opponent only have 56 hands on him he likes to see flops 61/25 with 1.3 agg factor. But in 56 hands I am not sure its accurate enough to really decide what kind of player this really is. I put him on a straight but now he bets this river. Is it to nitty to call here or is it to aggro to shove with on reads on the opponent who seems some what fishy but not sure.

[converted_hand][hand_history]WPN, $0.10/$0.25 Pot Limit Omaha Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

SB: $25 (100 bb)
BB: $39.65 (158.6 bb)
UTG: $25 (100 bb)
MP: $25 (100 bb)
CO: $53.54 (214.2 bb)
Hero (BTN): $45.34 (181.4 bb)

Preflop: Hero is BTN with J J T K
3 folds, Hero raises to $0.85, SB folds, BB calls $0.60

Flop: ($1.80) 5 3 J (2 players)
BB checks, Hero bets $1.28, BB calls $1.28

Turn: ($4.36) A (2 players)
BB checks, Hero bets $2.07, BB raises to $8.28, Hero calls $6.21

River: ($20.92) A (2 players)
BB bets $9.94, [color="red"]

I'd just call here, if he has a straight he'll probably fold to your shove and it might only be better hands you get called by.

River sizing makes me believe that villain is likely bet/folding a straight, if he somehow got here with A's full I'd expect him to bet larger OTR.

shoveing as a bluff?

Calling your beating trip aces and straights and losing to full houses with aces.

If he is floating as bluff on turn and continues with his bluff on river you can pick those of with a call.

Raising only gives villian the possibility to raise all-in with hands that beats you.

No reason to shove without reads. Call and get some.

Definitely bet bigger ott. Against described villain, bet bigger otf as well. I lean towards calling river over raising. 60 hands isn't an irrelevant sample, and a 1.3 agg factor combined with other seemingly passive stats leaves me hesitant. Sizing isn't abnormal if he has A3, and maybe even A5.