How the Squid Lost Its Shell

Published on April 26, 2018

Captions provided by CCTubes – Captioning the Internet! The ancestors of modern, squishy cephalopods like the octopus and the squid all had shells. In ancient times, their shell was their greatest asset but it eventually proved to be their biggest weakness.

Special thanks to Franz Anthony for the beautiful cephalopod reconstructions. You can see more of Franz’s tremendous work at

And thanks as always to Nobumichi Tamura for allowing us to use his wonderful paleoart:

Produced in collaboration with PBS Digital Studios:

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