A crab trap has a mesh extending over a crab trap frame, with at least one crab inlet opening provided with a one-way inlet gate spaced apart pins which are pivotable between open and closed positions. Pin retainers prevent spreading of the pins apart from one another when the pins are in the closed position and an undersized crab outlet opening, dimensioned to allow undersized crabs to escape from the interior chamber, is provided at a side of the trap and at the bottom of the trap. The frame includes an top peripheral frame portion and the mesh provides finger grip openings at the top peripheral frame portion. The one-way inlet gate has first and second sets of spaced apart pins, each set being pivotable independently of the other between open and closed positions. Also, the one-way inlet gate has pairs of pins which are pivotable between the open and closed positions, each pair being formed by parallel legs of a U-shaped length of wire, with retainers engaging the legs of each pair to prevent spreading of the legs.
