We just learned about the Firefly Squid that can light itself up.
Another cephalopod is the Orthoceras.
This is a type of nautilus that is extinct, which means they aren't around anymore.
We only know they existed because people have found fossils from a long time ago.
They are a type of nautilus, but very different because their body is shaped like a long cone.
![orthoceras](https://upload.wikimedia.org/wikipedia/commons/4/4a/Orthoceras_BW.jpg)
(from: wikipedia - orthoceras)
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