Spinosaurus aegyptiacus: semiaquatic and larger than T. rex

A dinosaur discovered over a century ago turns out to have probably been “semiaquatic”— the only known dinosaur adapted for living and hunting in a water environment.  New fossils of the huge predator reveal it adapted to life in the water some 95 million years ago, providing the strongest evidence to date of a dinosaur able to live and hunt in an aquatic environment.

The giant, sail-backed Spinosaurus was a formidable aquatic predator built for swimming and hunting in water.