Spinosaurus

Spinosaurus was a spinosaurid dinosaur that lived during early Cretaceous in Africa (the Kem Kem). It was the biggest member of its family, and one of the last. By recent counts, it is even bigger and longer than Tyrannosaurus Rex, but unlike Tyrannosaurus, Spinosaurus appears to have fed on fish and similar creatures, not hunted other dinosaurs (usually). Consequently, it has long and relatively slender, crocodile-like jaws with teeth that are suited to catching prey rather than tearing it apart and large front legs with well-developed claws to defend Spinosaurus against other predators and also to rip prey apart. In fact, the front limbs of Spinosaurus are so robust, that it is possible that this dinosaur could walk, or at least rest, on all four legs some of the time.

Spinosaurus' most famous feature is its sail. Even now the scientists wonder what it could be used for - the most popular theories involve thermoregulation and displays between males and females of the species. Other theories also exist.

Spinosaurus was a specialized, fish-eating theropod that needed plenty of fresh water to live. When by the middle of Cretaceous the rivers, lakes and swamps of northern Africa dissappeared, so did this dinosaur.