We just learned about the Giant Cuttlefish.
Another type of cephalopod is the Parapuzosia.
This animal is extinct now, but it was part of the ammonite family, which look a lot like the shelled nautilus, but are actually their own family in the world of animals.
These Parapuzosias would grow to be around 2 feet wide, but one person found pieces of an old shell showing one that was over 8 feet tall!
(from: wikipedia - parapuzosia seppenradensis)
Kid Facts - Blast from the past: Tomato Frog