| Enchanted Learning: Horseshoe Crab: Anatomy printout and information about this shelled invertebrate that lives on the ocean floor in warm, shallow waters. |
| Horseshoe Crab: Offers an introduction to horseshoe crabs. Find out more about this 'living fossil' and take a short quiz about these critters. |
| Horseshoe Crabs - A Living Fossil: Contains facts about the oldest living fossil in Maryland, the Horseshoe Crab. Includes anatomy, conservation, medical uses, and raising crabs. |
| Island Aquarium: Horseshoe Crab: Description and images of the horseshoe crab, which are not crabs at all, but distant relatives of the spider. |
| Mystic Aquarium: Horseshoe Crab: Facts and images provided for the Limulus Polyphemus or horseshoe crab. |
Classical
