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Belemnites lived during the periods of Earth history known as the Jurassic and Cretaceous. Belemnites were marine animals. Their closest living relatives are squid and cuttlefish. They had a squid-like body but, unlike modern squid, they had a hard internal skeleton. In the animal's tail, this formed a bullet-shaped feature. It is these parts which are normally found as fossils.

Belemnites can be 65 to 200 million years old. They lived in the sea and can be found in sedimentary rocks.



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