In the ancient oceans of the Jurassic, survival begins at birth. As Ophthalmosaurus give live birth beneath the waves, predators like sharks circle. But a greater danger looms in the depths... This clip is taken from Walking with Dinosaurs (1999). Subscribe: http://bit.ly/BBCEarthSub #Dinosaurs #WalkingWithDinosaurs #Liopleurodon #PrehistoricPredators #Ophthalmosaurus Watch more: Best of BBC Earth 🌍 https://bit.ly/BestOfBBCEarth Best Animal Fights 🥊 https://bit.ly/BestAnimalFights Videos over 10 minutes ⏰ https://bit.ly/3SHJCEJ Planet Earth III 🌍 https://bit.ly/PlanetEarthIIIPlaylist Frozen Planet II ❄️ https:/bit.ly/FrozenPlanetIIPlaylist Blue Planet II in 4k 🌊 https://bit.ly/BluePlanetII4kPlaylist Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of entertaining and thought-provoking natural history content. Dramatic, rare, and exclusive, nature doesn't get more exciting than this. This is a commercial page from BBC Studios. Service information and feedback: http://bbcworldwide.com/vod-feedback--contact-details.aspx