Safari Ltd TylosaurusSafari Ltd Tylosaurus Tylosaurus was a ferocious marine lizard that powered itself through the water with sweeping motions of its long body and fish like tail. At a massive 46 ft long, it was about the size of a humpback whale and one of the largest mosasaurs. It lived in the Western Interior Seaway of North America during the Late Cretaceous, from about 75 to 85 million years ago. Safari Ltd Model 304429 Size in cm: 22. 73cm x 4. 95cm x 5. 59cm The