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Horseshoe Crab Migration Arriving on Maryland Shores May 27, 2021 Maryland’s shores welcome back the annual return of the horseshoe crab – Limulus polyphemus in one of the world’s oldest and largest wildlife migrations.  For an estimated 350 million years, these prehistoric creatures have migrated into Maryland’s coastal bays from their winter habitats to spawn along the coastline and subtidal habitats. Although called “crabs” they are in fact arthropods. The height of horseshoe crabs spawning revolves around late spring and early summer high tides, culminating on or around each full and new moon in June.  On average, one spawning female horseshoe crab will deposit 20,000 eggs into the sand.  

United statesMaryland department of natural resourcesHorseshoe crab volunteer anglerHorseshoe crab migration arrivingEvent spawns new generationMaryland departmentNatural resourcesஒன்றுபட்டது மாநிலங்களில்மேரிலாந்து துறை ஆஃப் இயற்கை வளங்கள்மேரிலாந்து துறைஇயற்கை வளங்கள்