redoing the monster manual...
The bulette never convinced me--the hulking, silver kaijulike creature in the late miniatures have their appeal but (as I've said before) I can't really picture them eating a knight. So fuck 'em for this game.
The silt shark from Dark Sun on the other hand, does the same thing with more charm. I imagine it parting the sand with the prow of its frictionless, pointed face. I love the subtle claws they did on the fins.
And god do players freak the fuck out when they see a silt shark come up. Something about the single fin in the sand seen on the successful perception check--or the toothy suddenness of the attack in the wake of the failed one.
Sharks aren't terribly complex creatures--and I have no desire to make them any moreso. The one twist I added was based on the whole drop of blood thing--like rhythmic footsteps calling sandworms, killing anything in the desert risks bringing more. And, of course, killing a silt shark spills silt shark blood--and risks bringing more. Plus the kinds of predators hungrier for metal than meat.