| Diet | Carnivore |
| Height | 2m |
| Length | 15m |
| Weight | 15 tonnes |
| Speed | 40 km/h |
| Environment | Water |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Other |
| Location | Netherlands, Belgium, North Amer |
Although often thought to be a dinosaur, Mosasaurus was actually a giant marine lizard that ruled the ancient seas during the Late Cretaceous period, from about 82 to 66 million years ago. This formidable aquatic reptile was one of the largest predators ever to inhabit Earth's oceans, reaching lengths of up to 15 metres and weighing around 15 tonnes. Mosasaurus lived in the warm, shallow seas that covered much of Europe and North America during this time.
With its long, streamlined body and powerful tail, Mosasaurus was perfectly adapted for life in the water. Its limbs had evolved into paddle-like flippers, making it an efficient swimmer capable of reaching speeds of up to 40 km/h when hunting prey. The creature's massive skull, which could measure over 1.5 metres long, housed rows of sharp, cone-shaped teeth ideal for gripping slippery fish, squid, and other marine creatures.
As a carnivorous predator, Mosasaurus fed on a variety of marine life including fish, sharks, sea turtles, and smaller mosasaurs. Fossil evidence suggests it was an ambush predator, using its incredible size and speed to overwhelm prey. Its powerful jaws could deliver a crushing bite force that few creatures could survive.
Mosasaurus holds special significance in palaeontology as one of the first Mesozoic marine reptiles known to science. The discovery of its fossils in the late 18th century near Maastricht, Netherlands, helped early scientists understand the concept of extinction and revolutionised our understanding of prehistoric life.
Mosasaurus had an enormous elongated skull with powerful jaws filled with sharp, cone-shaped teeth. Its body was streamlined like a giant snake with four paddle-like flippers instead of legs, and a large, vertically flattened tail fin for propulsion through the water.
Mosasaurus was likely an ambush predator that used its massive size and burst swimming speed to surprise prey in the open ocean. Fossil evidence suggests it may have been somewhat territorial, and bite marks on fossils indicate that individuals sometimes fought with each other, possibly over territory or mates.
Mosasaurus gained widespread fame as the massive marine predator in the 2015 film Jurassic World, where it dramatically leaps from a lagoon to catch prey, though the film version was significantly larger than the real animal.
Mosasaurus was first described by William Daniel Conybeare in 1822. The original fossils were discovered at Chalk quarry near Maastricht, Netherlands.
