I've been learning about dinosaurs as you may have guessed, and I learned some more about the Spinosaurus!
Obviously, Spinosaurus means "Spine Lizard" because of the tell tale sail on it's spine. It's unique in that it has the nostils higher on the snout instead of at the end, a long body which could have walked on all fours or on two legs, a long tail, evidence of webbing between the claws, a long muzzle with jagged teeth and a hook shape at the end of the mouth. They believe it was a master of the marshlands and water ways and that it hunted by dibbing it's open mouth into the water and standing there, waiting for fish to pass by whilst the nostrils and eyes remained above water.
But how did it know that fish were passing by? Scientists believe Spinosaurus may have had sensors on the end of the muzzle like the ones crocodiles have. Y'know, those flecks that look like pours? Those are special organs to help sense prey in murky water.
So Spinosaurus may have existed as a fat, happy apex who could hold it's own against the other big preds at the time.
However, it's specialized features might have been the end of it. As the climate changed before the asteroid, the marshes and waterways would have changed, either becoming too dry or two wet for the correct hunting techniques of the Spinosaurus.
In the end, the Spino might have become endangered before the end of dinosaurs due to it being too specialized for a specific environment.
Another interesting fact, Spinosaurus was first discovered in 1912 in a rock formation in Egypt!
Hence why the full nomenclature is Spinosaurus Aegypticus.
So Trex is the tyrant king of lizards, Saurophaganax is the lord of saurian eaters...
And Spinosaurus was the pharaoh before pharaohs.
Admittedly, Spino DOES look a bit like Ammit the Devourer from the book of the dead...