I would think it would come in all sizes, small say 4' being average one would see regularly...bigger ones that are truly dangerous say 9-10 feet not as common, but still very much around.
go out deeper in the sea and 30 footers would be the norm
got the armature all rigged up, gonna start animating it soon, should be relatively easy
as there is no walking motion or any thing major like that, some good bites, a flicking of the tail, a swim motion, a relaxed motion, the death roll....
Blender is an insane program...I can actually paint right on the model itself like I would in GIMP and it will save it as a texture....