The main Ordovician floating animals were the

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The main Ordovician floating animals were graptolites, which were colonial animals that floated on the surface of the ocean with the help of gas-filled chambers called pneumatophores. Nautiloids and brachiopods were also common during the Ordovician, but they were not considered floating animals. Conodonts were small, tooth-like structures found in the fossil record but did not have any mobility or means of floating.

The Main Ordovician Floating Animals Were the