Spinosaurus

Intro Spinosaurus, meaning "spined reptile", was a large, meat-eating dinosaur* with a distinctive sail-like back and crocodile-like head. It lived in North Africa during the Late Cretaceous period, around 99–93.5 million years ago. Here's what we know about this iconic predator: Appearance** Spinosaurus had a 15-foot jaw, large conical teeth, and enormous spines up to 5 feet tall running along its back. The largest specimen measured 46 feet long and weighed 8.2 tons.