Even though they do not look like it, Mosasaurs were actually a branch of the Monitor Lizard family! They lived in inland waters during the Cretaceous. They could grow very large, with mouths full of sharp teeth. They used these sharp teeth to catch and eat fish, soft bodied animals like squid, and hard shelled animals known as Ammonites.
The Children's Museum of Indianapolis
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Marine reptiles, Fossil
Paleontology -- Cretaceous
Further information on this record can be found at its source.