The Ichthyosaurus is not really a dinosaur. Nevertheless, it is under this category because the Ichthyosaurus is very similar to a dinosaur and is generally refereed to as a dino. The Ichthyosaurus was small; it was only about 3.3 meters. We do know a lot about the Ichthyosaurus. This is because many fossils (several hundred) have been found in Holzmaden, Germany. Even a few specimens with an unborn baby, but also pieces of fossilized skin. Also the first complete fossil of an Ichthyosaurus was found by Mary Anning in England who was a very famous fossil collector.