vaccines and with the global hunt for cope with 19 job in full swing demand is higher than ever julia baines from animal rights group purser explains why the horseshoe crab will die out if nothing changes. crops are fascinating animal once they originated around 400000000 years ago they regard it as a living and they are now threats of extinction they are listed as a species now so much needs to be done to prevent them from being used in a bar treats the important part to consider is actually a good course you crabs do not need to be used in a bar cheese because there are synthetic alternative methods that can be used instead of using the blood from horseshoe crabs or horseshoe crabs are often referred to as living fossils to to their ancient linage every year pharmaceutical companies to collect half a 1000000 of them to extract about a 3rd of their blood the crabs are then released back into the ocean where about 15 percent of them die unable to survive on the reduced level of blood now on top of that crabs are also used as fish bait and the combined pressure on the population causing a sha