The mosasaurus is an extinct aquatic reptile, which first evolved around 70 mya. The creature in question would have been around ten - fifteen metres in length, and would have vaguely resembled a rather fat crocodile. This specimen is about 65 million years old, and was found in Morocco , North Africa . Just by looking at the teeth on the fossil, would you say that mosasaurus was a meat eater or a plant eater? Hover your mouse [here]  to find out.