Best Ever Q&A Space Our World Nature Evolution Prehistoric Life Dinosaurs Simple Creatures Insects & Spiders Fish Amphibians & Reptiles Birds Sea Mammals Land Mammals Ecology Animal Behavior Pets Farm Animals Plant Kingdom Plant Life History Science & Technology

Choose a Page:Which animals were the first to fly?Why did animals begin to live on land?Which was the earliest known bird?Why do dinosaurs have such long names?What were early humans like?What is a fossil?What were the first animals like?What did prehistoric fish eat?*Which reptiles ruled the seas?*How did mammals survive the Ice Age?What were the terror cranes?How did Pterodactylus fly? Which reptiles ruled the seas? Some 150 million years ago, the seas were ruled by ichthyosaurs and plesiosaurs. Both had streamlined bodies and paddle-shaped limbs. Ichthyosaurus resembled a cross between a fish and a dolphin. Some plesiosaurs, such as Cryptocleidus, had long necks; others, like Peloneustes, were whale-like. Ichthyosaurs and plesiosaurs ate mainly fish, but some plesiosaurs also ate one another.   Previous: Back Book: Best Ever Q&A Section: Nature Chapter: Prehistoric Life