- Report a Sighting or Tags
- Join the Count
- Just flip 'em!™ Program
- Community Sanctuaries
- Create a Historical Record
- Teacher Resources
- Horseshoe Crabs & the Arts Competition
- Become an ERDG member
- Make a Donation
- Contribute to the Conservation Fund
- Sponsorship Opportunities
Horseshoe Crab Sightings
Click on a state or country name for horseshoe crab sighting locations.
If you have seen horseshoe crabs in a location not yet listed, please let us know!
Report a Tag!
All horseshoe crab tagging information in the USA is managed by the USF&WS and should be reported through their website. Tags on horseshoe crabs are quite obvious, as shown in the photo at left.