7 Deadliest Prehistoric Predators That Ruled The Ocean

🔔 Subscribe to Primal Killers for more of the deadliest predators to ever exist:    / @primalkillers_1   T. Rex ruled the land. Fifty feet below the surface, something else ruled the ocean, and one of them may have hit even harder. These are the 7 deadliest prehistoric sea monsters of the dinosaur era. And number one? It's been staring you in the face for years, and you never even knew it.