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How do female horseshoe crabs lay their eggs?
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horseshoe crab
Horseshoe crab (Limulus polyphemus).
Female horseshoe crabs lay their eggs during the spring and summer, typically after sunset and often during high spring tides. Accompanied by one or more males, the female scoops out a series of depressions in the sand on beaches. She then deposits a clutch of several thousand eggs into each of these depressions, which the males subsequently cover with sperm. These nests are usually located just below the high-water mark.1