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Related to Portunidae: swimming crab
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|Noun||1.||Portunidae - swimming crabs|
arthropod family - any of the arthropods
Brachyura, suborder Brachyura - an order of crustaceans (including true crabs) having a reduced abdomen folded against the ventral surface
swimming crab - marine crab with some legs flattened and fringed for swimming