Brachiopods, the Most Prolific Organisms of the Ordovician

Ever seen a brachiopod before? They are not very common now but back in the Paleozoic they were EVERYWHERE! Want a longer form video? Let me know in the comments!

[@williamchamberlain2263]

Is that croissant shape at 0:45 a defence mechanism, or to help anchor them in mud against current?

[@rooryan]

Eh. They had their time.