Horseshoe crabs are not true crabs. The closest land relatives are spiders and scorpions. Horseshoe crabs are often found buried in muddy and sandy sediments. They sometimes reveal themselves at low tide.
Some favorite foods are worms, clams and mussels.
Breeding females are larger than males, and can reach a size of 2 feet, including the tail. During spring, especially on a full moon tide, hundreds of paired horseshoe crabs can be found spawning along the shoreline. The Florida Aquarium. All rights reserved.