What did supercroc eat?

Supercroc is said to eat dinosaurs. I don't know if this was true or not, but by the size of it, it very well could eat a dinosaur easily, and even be feared by the dinosaurs. We always thought that Dinosaurs were not afraid of anything (or at least the big carnivores, such as the T-Rex) But, maybe even they feared 1 thing. Supercroc.