Is this an ok spot to semibluff? SB v. BB

[skier_5]

Table has been pretty aggressive, villian seemed fairly tight and just got his big stack a couple hands ago when he got AI preflop with AA.

PokerStars Tournament, Big Blind is t4000 with t200 antes (7 handed) Converter on pregopoker.com

UTG (t48190)
UTG+1 (t71635)
MP1 (t178168)
CO (t72370)
Button (t137820)
SB (t152141)
Hero (t104111)

Preflop: Hero is in BB with T[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/club.gif[/img]
<font color="gray">UTG folds</font>, <font color="gray">UTG+1 folds</font>, <font color="gray">MP1 folds</font>, <font color="gray">CO folds</font>, <font color="gray">Button folds</font>, <font color="red">SB raises to t16000</font>, Hero calls t12000

Flop: (t35400) 8[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/heart.gif[/img] (2 players)
<font color="red">SB bets t20000</font>, <font color="red">Hero raises to t87911 (All-in)</font>, SB calls t67911

Turn: (t211222) 9[img]/images/graemlins/diamond.gif[/img] (2 players)


River: (t211222) Q[img]/images/graemlins/diamond.gif[/img] (2 players)