Spinosaurus aegyptiacus was a massive spinosaurid theropod that lived during the Cenomanian stage of the Late Cretaceous, approximately 100 to 94 million years ago. Its fossils are primarily found in North Africa, including Egypt, Morocco, and Niger. With its crocodile-like skull, sail-backed spine, and adaptations to an aquatic lifestyle, Spinosaurus stands out as one of the most anatomically unusual—and scientifically debated—dinosaurs ever discovered.