+Ammonites were an extinct group of marine [cephalopods](/wiki/cephalopods), recognized by their distinctive, coiled shells. Flourishing during the Mesozoic Era, they are among the most common and widely studied [fossils](/wiki/fossils) of ancient ocean life.
+## See also
+- [Paleontology](/wiki/paleontology)
+- [Dinosaur](/wiki/dinosaur)
+- [Nautilus](/wiki/nautilus)
... 1 more lines