Under The Sea

It's Fossil Friday!

Did you know that the sea urchin and the sand dollar belong to the same family? Echinoderms also include sea stars and sea cucumbers. They are marine invertebrates with a water-vascular system. They have been living in the seas for about 450 million years.The flower on the surface of the fossil is the outline of the creature's pores and the center of it is where its mouth was. Some of them lived buried deep in muddy sediment, where they fed on microscopic organisms to survive, while others adapted their diet to their environment.

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