The Mosasaurus is tamed by luring it toward shallower water or an underwater trap, then safely knocking it unconscious and maintaining its torpor while feeding it aquatic carnivore food. Once tamed, it serves as a powerful, durable ocean mount for combat, hunting, resource gathering, deep-sea exploration, and mobile platform-based support. When encountering one, use a fast, maneuverable mount to stay behind it, exploit its wide turning radius, and retreat upward or away if necessary while monitoring oxygen and nearby predators. Alpha variants demand especially strong preparation and a reliable escape route.