Horseshoe crabs’ bodies are divided into three segments. The head, or prosoma, houses most vital organs, including the heart and the brain. The middle segment, the opisthosoma, contains the back ...

According to curator Kojiro Azumakawa, the horseshoe crab has a bowl-shaped smooth shell, spiny body, crab- or spider-like legs and a long, stout tail. It is a “living fossil” whose appearance ...

Horseshoe crabs are brown, body-armored arthropods with 10 eyes and a long, spiked tail. Despite their intimidating appearance, they are completely harmless to humans. Each spring along the Atlantic ...