Top 20 Most Incredible Prehistoric Sea Monsters

Time travelers should stay out of the water! For this list, we’ll looking at the most fascinating and remarkable sea creatures from prehistoric times. Our countdown includes Mesosaurus, Kronosaurus, Helicoprion, Megalodon, Livyatan Melvillei, and more! What's YOUR favorite prehistoric sea monster? Let us know in the comments! Watch more great monster videos here: Top 20 Monster Characters of All Time:    • Top 20 Monster Characters of All Time   Top 10 Scariest Movie Monsters:    • Top 10 Scariest Movie Monsters   Top 20 Best Monster Movies of the Century (So Far):    • Top 20 Best Monster Movies of the Cen...   Have Your Idea Become A Video! https://wmojo.com/suggest Subscribe for more great content! https://wmojo.com/watchmojo-subscribe Visit WatchMojo Club for Great Deals! https://wmojo.com/WatchMojoClub Your trusted authority for Top 10 lists, reviews, tips and tricks, biographies, origins, and entertainment news on Film, TV, Video Games, Comics, Celeb, Music and Superheroes. #SeaMonsters #Prehistoric #Scary