A recently discovered deep-sea snail, the Scaly-Foot Gastropod, has a shell that is impressively developed. So much so that the U.S. military is trying to use its design to inspire defensive layers in military armour.
100 Mind-Blowing Defensive Facts
In feudal Japan, lords purposely built homes with squeaky floors as a defensive measure against ninjas.
Turkey vultures use defensive vomit to get rid of any disturbing animal. They can propel their vomit up to 10 feet.