Preflop A987 vs Fish repot in position

[bluffbetter]

Reraiser is a fish who calls very loose, so I would imagine this is very often AAXX or KKXX. Can I call here or is it a fold? He will likely pay-off if I hit but I have very little chance of bluffing him off his overpair. I'm thinking I should fold here, especially as there's a fair chance UTG has aces. The only read I have on UTG is that he almost certainly raised QQ on the button with one limper and has made very few raise but only from about 40 hands.
I would think it's more likely that the reraiser has AAXX than the initial raiser, so there's a good chance that UTG won't repot.


PokerStars Pot-Limit Omaha High, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

CO ($49.30)
Hero ($67.20)
SB ($221.20)
BB ($31.40)
UTG ($42.70)
MP ($57.30)

Preflop: Hero is Button with 8[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">UTG raises to $1.75</font>, <font color="#CC3333">MP raises to $6</font>,CO folds, Hero ??