|LEGO® → Dinosaurs|
6721 Mosasaurus is a Dinosaurs themed set released in 2001. This set includes instructions for Dimetrodon, Iguanodon, Mosasaurus, and Postosuchus. The tongue is actually a Crocodile head in a red colour.
Mosasaurus (which means "lizard of the Meuse River") was a large genus of Mosasaur from prehistory, measuring 48 feet long.
- It is also possible to create a sand blue version of Plesiosaurus from the 6719 Brachiosaurus set using the parts from this set.