The Silurian Era: The First Sharks (1 gen 450000000 anni a. C. – 1 gen 0 anni)

Descrizione:

450 million years ago, during the Silurian period, sharks first began developing as a unique species. During that time, the ocean was filled with a variety of bony fish. One of these fish, the Acanthodian, was the very first ancestor of the modern shark.

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