Being stung by a horseshoe crab's spines is not poisonous. The spines of the horseshoe crab are mainly used to help swimming and turning over. Although they are sharp, they are not poisonous. But be aware that horseshoe crabs live in the ocean and may carry some bacteria, parasites and other pathogens.

If you are pricked by the spines of a horseshoe crab, the wound may be infected with these pathogens, leading to disease. Therefore, after being stabbed, you should seek medical treatment promptly and clean and disinfect the wound to avoid infection and related complications. At the same time, in daily life, you should try to avoid direct contact with marine life to prevent injury or infection.