Ammonite

Like the modern nautilus, this relative of modern squid hunted from inside the safe haven of a protective shell. Ammonites went extinct around the same time as the dinosaurs—65 million years ago.  Find more about ocean predators in our interactive timeline Who's on Top?

Illustration of the extinct ammonite, related to the modern squid.
Credit: 

Mary Parrish/Smithsonian Institution