Horseshoe crab, an arthropod in the ocean, is mostly blue-brown and dark-brown. This creature has existed for hundreds of millions of years since it was opened up on the earth, and its ancestors can be traced back to the Cambrian period a long time ago. This horseshoe crab, which looks very similar to shrimp and crab, is very rare because of its small number.

It has four eyes, and there are two small eyes at the front end of the head breastplate. These two small eyes can perceive brightness and are very sensitive to ultraviolet light. On both sides of the head and breastplate, there are a pair of compound eyes, which are similar to several small eyes. The radar and TV system in daily life relies on the inhibition of horseshoe crab's compound eye side, which can make the influence of objects more clear.

Life habits of horseshoe crabs

Most horseshoe crabs live near the shore, but the waters are deep. They are not very good at swimming. In the water, they often just beat the water with their body flaps or crawl on the seabed with soft mud, which is very slow. The main food is some small ha or tiny larvae.

Most horseshoe crabs live near the shore, but the waters are deep. They are not very good at swimming. In the water, they often just beat the water with their body flaps or crawl on the seabed with soft mud, which is very slow. The main food is some small ha or tiny larvae.