We just learned about the White Spotted Octopus.
Another type of cephalopod is the Plectronocerida.
These are an extinct type of cephalopod like a nautilus that had a shell on it's back.
These cephalopods would crawl along the bottom of the water and eat food, almost like an underwater snail.
(from: wikipedia - plectronocerida)
Kid Facts - Blast from the past: Eastern Narrow Mouthed Toad