#OceanRunnerNH: Horseshoe Crabs 101

Posted on September 1, 2016

Horseshoe crabs, Limulus polyphemus, are often referred to as dinosaurs of the sea. Fossils show that the have lived on earth, unchanged, for about 480 million years! A horseshoe crab’s entire body is protected by a hard carapace, which molts when it grows. Ocean Runner Nichole is inspired to learn more about this ancient animal when she finds a molt on the beach. Seacoast Science Center Naturalist Ben Flynn fills her in on the facts.

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24th Annual BioBlitz!

Sunday, September 20, 2026 • 7 AM-4PM

Join us at Odiorne Point State Park to discover the incredible diversity of species found along our Seacoast. All ages and experience levels are welcome!

CLOSING EARLY: THURSDAY, May 22, 2025. Due to anticipated high winds, we will be closing at 3pm today, to prioritize the safety of visitors, volunteers & staff. Stay safe.

Update: Tuesday, July 7, 2026

Planning to visit today?

It’s a good idea to reserve online, especially with rain forecasted, as rainy summer days often find us at capacity, particularly in the morning, with walk-ins depending on availability. Book tickets here. 

Seacoast Science Center
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