Crab traps are devices used to catch crabs in various bodies of water. They are typically made of wire mesh and come in different shapes and sizes, such as pots or traps with funnel openings. The design allows crabs to enter but makes it difficult for them to escape. These traps are often baited with food, like fish or chicken, to attract crabs. Fishermen place them on the ocean floor or in estuaries, where crabs are commonly found. After a set period, the traps are retrieved to collect the crabs, which are then used for cooking or sold in markets.