Spinosaurus

Spinosaurus was a large theropod dinosaur associated with Cretaceous river environments in North Africa. Its long snout and conical teeth suited catching slippery prey, including fish, while elongated back spines formed a conspicuous sail-like structure. Fossil discoveries have changed reconstructions of its body. The amount and manner of swimming remain debated, so its relationship with water is clearer than any single detailed hunting scene.