A bottom-living, marine arthropod related to the arachnids (subphylum: Chelicerata) not to the true crabs (subphylum: Crustacea); body divided into a prosoma, covered by a horseshoe-shaped carapace, and an opisthosoma, carrying six pairs of legs and five pairs of gills; also known as king crabs. (Class: Merostomata. Order: Xiphosura.)
| iHorseshoe crab |
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Pair of horseshoe crabs |
| Conservation status |
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