Image represents Ichthyosaurs. It is the largest marine animals of the Jurassic and Cretaceous periods. Ichthyosaurs means “fish lizard”. They appeared 245 million years ago. They are considered as top aquatic predators. It swim up to 40 km/h. They lay eggs. It grows up to 2 to 4 m in length. They weigh up to 163 to 168 kg depends upon size. They look in gigantic appearance. Under these Ichthyosaurs there are many types. It seems to be dolphins but they were predators. Their embryos fossils founded in England, Wales.