Giant crab may refer to:
Japanese spider crab (Macrocheira kaempferi), possesses the longest leg span of any marine crab species alive Coconut crab (Birgus latro), the largest terrestrial invertebrate species alive Tasmanian giant crab (Pseudocarcinus gigas), another large crab species
See also Giant Enemy Crab, a 2006 Internet meme A Giant Crab Comes Forth debut album by Giant Crab (band)