The Nautilus is not an Ammonite, however it is from the Cephalopod family, which includes, Squid and Octopus. The Nautilus is visually the nearest living relative of the Ammonites and is still with us today. The animated gif picture you can see above is of a Nautilus.

1. beautiful Nautilus cenoceras from YCF - 2. a small Nautilus cenoceras, my only Nautilus find to date and 3. a shell from a present day pacific Nautilus.

 1. Nautilus cenoceras Upper Lias Lower Jurassic - 7.5cm

 2. Nautilus cenoceras Upper Lias Lower Jurassic - 3.3cm

 3. NOT a fossil - present day Nautilus shell - 10cm