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Horseshoe Crabs

Horseshoe crabs are important to both coastal communities and human health.

Facts About Horseshoe Crabs and FAQ
Ancestors of horseshoe crabs date back to 445 million years--long before the age of the dinosaurs.

Florida Horseshoe Crab Watch-Linked with Limulus
Become a Citizen Scientist! Join the program in which trained volunteers conduct scientific surveys of horseshoe crabs in Florida.

Why Document Nesting Beaches?
These sightings help biologists identify nesting beaches around the state.

Report Your Nesting Horseshoe Crab Sighting
Have you seen nesting horseshoe crabs? Let us know! Report sightings of horseshoe crab mating activity with this online questionnaire.

The Horseshoe Crab Fishery in Florida
In Florida, most horseshoe crabs are collected live for use in aquaria and research.

Further Reading and Limulus Links
Articles, publications and helpful websites about horseshoe crabs.

Glossary of Crustacean Terms