What is a hermit crab? There are over 800 species of hermit crabs worldwide, and almost all are ocean dwellers—though people are likely most familiar with the dozen semi-terrestrial species ...
They’re in the class Merostomata, which means “legs attached to the mouth” because their mouths are literally in the center of all 10 legs. Horseshoe crabs also have 10 eyes—a pair of ...
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