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.
(from: wikipedia - orthoceras)
Kid Facts - Blast from the past: Red Eyed Tree Frog