Don't underestimate the vitality of horseshoe crab just because its life cycle is so short. According to scientific research, horseshoe crab eggs can remain blind for about 25 years during the egg period, which means that horseshoe crab eggs can still hatch in a suitable environment within 25 years. During the incubation period, if the environment suddenly becomes unsuitable for them, the horseshoe crab eggs will stop hatching.
In hundreds of millions of years, the earth has experienced three mass extinctions. Of course, horseshoe crabs also witnessed the whole process of dinosaur birth and extinction. But what is even more amazing is that horseshoe crabs are not very effective. It can be said that there are no horseshoe crabs, so they are often used by many locals to feed chickens and ducks, which can be said to be quite miserable.
Horseshoe crabs also have a nickname "Three-eyed Dinosaur Shrimp", which is not casually called. Horseshoe crab has a pair of symmetrical compound eyes with an eye between them. Although horseshoe crabs have three eyes, their eyesight is only enough for them to see the front 10 cm.
Horseshoe crab is a typical underwater habitat, which is widely distributed all over the world, but horseshoe crab mainly lives in fresh water areas, such as lakes, ponds, puddles or rice fields. The horseshoe crab has many pairs of gills, which is enough to make it have many talents, such as swimming, crawling and digging holes. There are few natural enemies of horseshoe crab, which is an omnivore and will eat Daphnia, algae or other small plankton.
In addition, horseshoe crabs are beneficial insects. They eat crabs, the larvae of this mosquito. Besides, horseshoe crabs are used as herbicides in Japan, and some Japanese keep horseshoe crabs as pets. According to scientific research, the life span of horseshoe crab in space can be extended to about 18 months, and it may become a source of high protein for space astronauts in the future.