Great display piece with highly visible suture lines and great coloring. The hollow cavities, or chambers, of this specimen inspire reflection on just how something so delicate could stay in tact for over 100 million years. Isn't nature awesome?! Polished on both sides. Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely related to a living octopus, though the shells resemble that of a nautilus.