what is the color of horseshoe crab blood
Horseshoe crab Horseshoe crabs use hemocyanin to carry oxygen through their blood. Because of the copper present in hemocyanin, their blood is blue. Their blood contains amebocytes, which play a similar role to the white blood cells of vertebrates in defending the organism against pathogens. Amebocytes from the blood of L. polyphemus are used to make Limulus amebocyte lysate, which is used for the detection of bacterial endotoxins in medical applications.[19] This means there is a high demand for harvesting the blood, which involves collecting and bleeding the animals, and then releasing them back into the sea. Most of the animals survive the process; mortality is correlated with both the amount of blood extracted from an individual animal, and the stress experienced during handling and transportation.[20] Estimates of mortality rates following blood harvesting vary from 3-15%[21] to 10-30%.[22] Approximately 500,000 crabs are harvested annually.[23]
Color in Chinese culture Generally green is associated with health, prosperity, and harmony. Green is also the color of jade. Separately, green hats are associated with infidelity and used as an idiom for a cuckold.[2] This has caused uneasiness for Chinese Catholic bishops, who in ecclesiastical heraldry would normally have a green hat above their arms. Chinese bishops have compromised by using a violet hat for their coat of arms. Sometimes this hat will have an indigo feather to further display their disdain for the color green.