"Chinese horseshoe crab" is also called "horseshoe crab fish", horseshoe crabs, belongs to the limb stomatopods arthropods, sword-shaped tail, the body of the yellowish-brown, usually live in the South China Sea. Horseshoe crabs are gill-breathing arthropods, and there are only four species of horseshoe crabs left in the world. This turtle-like creature is found along the southern coast of China and is most abundant in Beibu Gulf. On the seashore of Beibu Gulf in Guangxi, swarms of horseshoe crabs crawling onto the beach to lay their eggs are a popular story among local fishermen.

But horseshoe crab resources are now in sharp decline. Due to land reclamation and beach development (because horseshoe crabs are very picky about where they grow), the horseshoe crab has lost the shallow sandy beaches it relies on for its habitat. The blood of horseshoe crabs is blue in color due to the presence of copper ions. The "horseshoe crab reagent" extracted from this blue blood can accurately and quickly detect whether the internal tissues of the human body are infected by bacteria; it is also widely used in the pharmaceutical and food industries to monitor toxin contamination. Its shell can be refined into medicine can cure hyperthyroidism and other diseases, because of the value of the horseshoe crab, in recent years, a large number of chitin processing plant with its shell as raw material; at the same time, the horseshoe crab has a high food value, so it can not escape from the fate of the indiscriminate killing, facing the extinction of the catastrophe.