Some fishermen use cage trap to catch fishes and crustaceans. The cage traps are designed to encourage the entry of marine organisms, which are then prevented from escaping either by particular aspects of their behaviour or by the design of the trap itself. The most common trap used by Hong Kong fishermen are baited traps. The operation of baited traps is that animals attracted to the bait, enter the trap through tapered openings from which it is difficult to escape. Major catch includes rabbit fish, moray eel, cardinal sea bream and other crustaceans.