Ključne besede: Nature at Your Door Frank Taylor, horseshoe crab, Limulus polyphemus, At risk, at risk species, vunerable species, endandgered, horseshoe crab population, horse crab uses, conch bait, horseshoe crabs for bait, hor, horsecrab harvest, horseshoe crab blood, blue blood, copper-based blood, uses of horseshoe crab blood, horseshoe crab and medicine, horseshoe crab protection, population decline, horsecrabs at risk, horseshoe crab numbers, horseshoe crab breeding, horsecrab mating, horsecrabs on beach at night
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