Not a dinosaur
Mosasaurus
A sea reptile, not a dinosaur. It swam with flippers and hunted in the sea.
Say it: mo-za-SORE-us
- Name means
- Meuse lizard, after the River Meuse
- What it was
- A sea reptile, related to lizards and snakes. Not a dinosaur.
- Size
- The biggest may have been 17 to 18 metres long, though some scientists think less
- Ate
- Fish, squid and even sharks
- Lived
- Late Cretaceous
- Fossils found
- Named after the River Meuse, which runs through Maastricht in the Netherlands
Facts for little ones
- Mosasaurus wasn't a dinosaur. It was a sea reptile, more closely related to lizards and snakes.
- It swam with legs shaped like flippers.
- Its teeth could grab fish, squid and even sharks.
Mosasaurus in Dinolets
Mosasaurus is egg number 12 of 12. In the game it's blue, and its special feature is the one the voice calls out: "Big flippers!"
In Feed it eats fish, and from level 2 your child is asked to pick the right food for it. Once it has hatched, it joins in the other games too.
When your child meets it, the voice says: "Mosasaurus isn't a dinosaur, it's a sea reptile!"
Sources
Checked November 2026 against:
The way to say the name is how the Dinolets voice says it.