hyosaurs swam in the mesozoic ocean. They were on average 2-3 meters in length with a large tail fin for swimming. They were air breathing, carnivorous and the mom had the babies developed in her stomach. One skeleton was found with her baby still inside. They had a long beak and numerous teeth and their nostrils were far back. The eyes of a Icthyosaurs were ringed sclerotic plates. Their backbone is very flexible. In 2004, they found a new species of Icthyosaurs. This one is over 5 meters long! This species is unknown.

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