A collapsible trap (10) particularly suitable as a crab pot for trapping crabs. The collapsible trap (10) comprises a frame structure (13) having a central axis and pliant material such as netting (15) attached to the frame structure (13). A haul line (11) is connected to the frame structure (13). The frame structure (13) comprises a plurality of elongate frame elements (31). The frame structure (13) is moveable between a retracted condition in which the frame elements (31) extend generally parallel to central axis and an extended condition in which the frame elements (31) extend outwardly of the central axis giving form and shape to the netting (15) to provide an enclosure (17) defining an entrapment zone (19). When the frame structure (13) is in the retracted condition, the netting (15) can be wrapped about the frame structure (13) to assume a compact condition for storage and transportation. In one arrangement, the enclosure (17) is configured as a cage having several entry openings (27) through which crabs can enter the enclosure (17), and an access way (81) incorporating an opening (83) for retrieval of crabs trapped within the enclosure (17).