There is something quite disturbing about this image. Draining horseshoes of their blue blood. It’s like totally abusive and this abuse is an absolute disgrace. There is a beautiful bird that relies on eating the horseshoes eggs for survival. With no horseshoes eggs to eat they now on the endangered species list.
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https://www.nhm.ac.uk/discover/horseshoe-crab-blood-miracle-vaccine-ingredient.html
But there is hope: in the late 1990s biologists at the University of Singapore realised that a synthetic alternative could be created in a lab by cloning a molecule in the crab blood. This genetically engineered protein is called Recombinant Factor C, or rFC.
Some governments, including the Japanese and Chinese, have approved the rFc test for use. It is likely that a new Covid test manufactured in the UK will use synthetic ingredients, which are also approved by the European Union. Pfizer, a pharmaceutical company developing one of the biggest potential Covid vaccines, said they won't be using crab blood in their jab.
There's a catch in this story. Synthetic ingredients and alternative tests are not yet widely used in some countries. For instance, America still bleeds many crabs every year. A small percentage of them die after being bled, although medicine producers are becoming ever more careful about keeping population numbers healthy.
It's also arguable medicine manufacturers aren't the biggest problem facing horseshoe crabs: in America many more are killed for fishing bait and lots are struggling in Asia because their habitat is disappearing.
Being bled is apparently the least of their problems.