river bluff 200 6max

[pmuir10]

have played quite a bit with villain, he is a weird player, but decently TAG.

Party Poker No-Limit Hold'em, $ Hero (6 max, 6 handed) FTR converter on zerodivide.cx

Hero ($195)
UTG ($297.20)
MP ($87.45)
CO ($189.80)
Button ($459.83)
SB ($335.38)

Preflop: Hero is BB with A[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $1.
<font color="#666666">1 fold</font>, MP calls $2, <font color="#666666">2 folds</font>, SB (poster) completes, Hero checks.

Flop: ($6) 5[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $5</font>, MP folds, SB calls $5.

Turn: ($16) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets $12</font>, <font color="#CC3333">SB raises to $24</font>, Hero calls $12.

River: ($64) K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets $55</font>.

i guess my question is, is this bluff retarded?