Abstract: A foldable crab trap for catching crabs which includes a central hinge member, a central frame member connected to the central hinge member, and a pair of outer frame members each having crab nets. The outer frame members are movable relative to the central hinge member between an open position wherein the outer frame members are in the same plane for receiving crabs, and a closed position wherein the outer frame member are parallel to each other for trapping crabs. A tension line is connected to the outer ends of the outer frame members and to the outer end of the central frame member for moving the outer frame members to the closed position. The tension line has a free end adapted to be held under tension by the crab catcher for signalling the crab catcher when a crab is present in the crab trap.