Megalodon

 { I just want to point out straight away that Megalodon did not live at the time of dinosaurs, but I did it anyway cause I treat it like it did } The Megalodon is the biggest shark to ever live! Apparently, it could reach 69 feet long!, snout to tail tip! Megalodon means "Big Tooth". Did you know, that once, a kid was digging on a beach under rocks, and found a Megalodon Tooth! If the Megalodon were still alive today, Humanity would be extinct! Megalodon went extinct 1 million years before humans, 2.6 million years ago. Their have been many "claimed" Megalodon sightings.

https://pandajunior.wwf.sg/issue-5/