What's my play? UTG is a kinda-fish short-buy. Stack sizes are kinda funny.

PokerStars No-Limit Hold'em, $2 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($116.85)
BB ($163.80)
UTG ($113.30)
MP ($92.85)
CO ($204.85)
Fnord ($245)

Preflop: Fnord is Button with 6, K.
UTG calls $2, 1 fold, CO calls $2, Fnord calls $2, 1 fold, BB checks.

Flop: ($9) A, J, 6 (4 players)
BB checks, UTG checks, CO checks, Fnord bets $6, BB folds, UTG calls $6, CO folds.

Turn: ($21) 9 (2 players)
UTG checks, Fnord bets $15, UTG raises to $30, Fnord ???