The horseshoe crab fish mainly lives in the shallow sandy seabed and prefers to live in estuaries with low salinity, and has the habit of going up the river. Horseshoe crab fish is commonly known as horseshoe crab sail, also known as the Oriental horseshoe crab, Chinese horseshoe crab, alias "two women". It belongs to the family of arthropods, class Amphipoda, order Swordtail, family Horseshoe Crab. Horseshoe crabs are mainly distributed in the Pacific Ocean, the West Indian Ocean, Monarch Island and Southeast Asian waters, the sandy seabed of algae. China's shallow sea south of zhejiang are produced. Chinese horseshoe crabs are non-toxic edible, round-tailed horseshoe crab meat and eggs are inedible, many places to this thing as a specialty dish, in fact, this creature contains a large number of copper ions and bacterial viruses, consumption may be fatal.