Ambergris, the famous spice with the overpowering sounding name, actually comes from the intestinal stones of sperm whales. Sperm whales love to eat squid, but can not digest the squid sheath, this hard inner shell will be stuck in the intestine, so the sperm whale will secrete a substance to wrap the inner shell, this mass of material in pathology is known as stones. This mass, which has only a 1% chance of finding its way into the sperm whale's body, gradually grows larger. This enlarged substance is the prototype of ambergris.