Blue crab may refer to:
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Blue Crab 11, an American sailboat design
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Callinectes sapidus
''Callinectes sapidus'' (from the Ancient Greek language, Ancient Greek ,"beautiful" + , "swimmer", and Latin , "savory"), the blue crab, Atlantic blue crab, or, regionally, the Maryland blue crab, is a species of crab native to the waters of t ...
'' – Chesapeake or Atlantic blue crab of the West Atlantic, introduced elsewhere
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Cardisoma guanhumi'' – blue land crab of the West Atlantic
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Discoplax celeste'' – blue land crab of Christmas Island
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Paralithodes platypus'' – blue king crab of the North Pacific
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Portunus pelagicus'' – blue swimmer crab of Australia and Southwest Pacific
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Portunus segnis'' - a Western Indian Ocean species, was recently recorded in Tunisian waters, where it is invasive
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Portunus trituberculatus'' – Japanese blue crab of the Northwest Pacific
{{Animal common name