Question: 2 questions about the T-rex urine. Why would the urine repel other dinosaurs? And what did he mean by "big one with a fin?"
BaconIsMyBFF
3rd Apr 2017
Jurassic Park III (2001)
Answer: 1: because it's a form of territorial mark, besides I don't think anything other than a crazy Dino or man, would go into that type of zone 2: that "thing" is called a Spinosaurus, as Allan says to Billy while holding one of its teeth near the plane.
Answer: The T-Rex urine would have the scent of the large predator and this would keep other, smaller dinosaurs away for fear of being eaten. Although this is complete nonsense, that's what the movie is going for. The big one with the fin is the Spinosaurus, the gigantic dinosaur that is hunting the group.
BaconIsMyBFF