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No its a crustation

crustaceans & arachnids are both arthropods(phylum) of the kingdom animalia, but a crustacean is a subphylum, while arachnids are a class of the subphylum chelicerata, so it's like they're they're a whole different category. Crabs are a class, malacostraca, of the subphylum, crustacean. As an interesting sidenote, certain"crabs" are not crabs or crustaceans at all; e.g., horseshoe crabs are a class, merostomata, of the same subphylum, chelicerata, as the arachnids, so they are, in fact, a closer relation to arachnids than to crustaceans, kind of like cousins.

CRAB

Kingdom: Animalia

Phylum: Arthropoda

Subphylum: Crustacea

Class: Malacostraca

Order: Decapoda

Suborder: Pleocyemata

Infraorder: Brachyura

ARACHNID

Kingdom: Animalia

Phylum: Arthropoda

Subphylum: Chelicerata

Class: Arachnida

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14y ago

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