And, if you live in the U.S., the brilliantly blue blood of these animals has been used to test every vaccine you've ever had.
Half a million horseshoe crabs are caught and bled each year in laboratories linked to pharmaceutical companies. The animals are strapped in while their blood is extracted for 24 to 72 hours. Bottles fill up with their blood, a stunning shade of blue, which will be used to test vaccines for harmful bacteria.
The images kill me. I hate humans.