Ancient Squids Had Protective Shells

Josh Welch

IllustrationAncient ancestors of the squishy, modern cephalopods like octopus and squid all had shells to protect them from predators. 

In the beginning the shells were a literal life-saver for these creatures, but over time it became a huge weakness. 

Luckily these soft and vulnerable creatures were able to adapt to their environment and eventually lose their heavy, cumbersome shells. 

Can you imagine a modern octopus or squid with a hard shell over its fleshy body? 

Check out this exciting video from PBS Eons to learn more about these fascinating creatures and their ancestors. 

Leave a comment below to let me hear your thoughts about this interesting discovery!