Do you think Liopluridon survive extinction?

Liopleurodon lived long before Megalodon did for one thing. Also, being a reptile, Liopleurodon would have to surface for air with some frequency. This would give it away. The chances of Megalodon still being alive are pretty slim, let alone a reptile that lived long before Megalodon.

Good point why didn't i think of that

Well, there have been sightings of plesiosaurs such as the loch ness monster and champ of lake champlain and there has been some pretty good photo evidence taken as well, so sure, why not? I mean, they've already rediscovered species like the coelacanthe and frilled shark, even the pygmy whale, something that megalodon used to feed upon, so it's very possible.

Nope. Totally extinct. No chance. The real monsters in the sea that actually exist include the Colossal Squid, the Whale Shark, and the Oarfish. But there are no Megalons or Liopluridons left.