A Mysterious Monster Lurked in Ancient Seas

by Aloniab Gezae, age 7

Not many people know about the mosasaurus. The mosasaurus lived during the Cretaceous period. They are not dinosaurs! They are reptiles. They have traits of mammals too.

Did you know the mosasaurus’ legs turned into flippers? Through adaptation, the mosasaurus’ legs turned into flippers, and their tails flattened, making them better swimmers. The mosasaurus is also called the T. rex of the deep. It is an apex predator of its surroundings, meaning it can defend itself from almost anything that tries to attack it.

It is good that the mosasaurus is extinct because if you ran into one, it would be bad.

[Sources: Critter Squad ; Kids Encyclopedia Facts; 100 Things You Should Know About Dinosaurs ]

Great work, Aloniab! I didn't know about the mosasaurus so I learned something new today! – Josepha Da Costa , Madison La Follette High School (2021-09-16 16:08)

i love learning about creatures from the past! It's so interesting reading about these pre-historic animals. Keep up the great writing, Aloniab! – Alan , Madison West High School (2021-09-16 16:14)

Good job, Aloniab! i was confused that it was in amother peroid but today i learn in what period it lived thank you so much – Dani , abudant life christian school (2021-09-16 16:25)