Fossil Sponges
These fossil sponges were found in the Cretaceous Farringdon Sponge Gravels in Berkshire, UK. They are about 110 million years old and are commonly known as Cup Sponges (scientifically as Rhipidomella). Sponges have been around since the Cambrian, they are still alive today and were particularly common in the Cretaceous. Although they are infact animals, they do not have a brain, and so are similar, in this respect, to Corrals and Jellyfish, both of which are also ancient life forms (Jellies having been around since the Pre-Cambrian).
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Side view
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Top view
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