blue is the color of horseshoe crab blood.
what is the color of horseshoe crab blood?
blue
there have occasionally been cases of food poisonings or even deaths after consuming the crabs as they were misidentified as another horseshoe crab species, "tachypleus gigas." unlike larger "t. gigas", "c. rotundicauda" is known to often contain lethal tetradotoxin.





















































in addition, horseshoe crabs are prized for their blue blood, as it is widely used in biomedical sciences for the development of drugs for diseases like mental exhaustion and gastroenteritis. the blood contains a chemical called "limulus" amoebocyte lysate (lal) that can be used to detect pathogens and their endotoxins.
mangrove horseshoe crab
section::::medical uses.





















































horseshoe crabs are valuable as a species to the medical research community, and in medical testing. the above-mentioned clotting reaction of the animal's blood is used in the widely used "limulus" amebocyte lysate (lal) test to detect bacterial endotoxins in pharmaceuticals and to test for several bacterial diseases.





















































enzymes from horseshoe crab blood are used by astronauts in the international space station to test surfaces for unwanted bacteria and fungi.





















































a protein from horseshoe crab blood is also under investigation as a novel antibiotic.
atlantic horseshoe crab