Trap fishing is a method of catching fish using a structure designed to entrap them. These traps can be made from various materials, such as wood, metal, or plastic, and are often placed in areas where fish are known to gather. The traps typically have an entrance that allows fish to swim in but makes it difficult for them to escape. This fishing technique is commonly used for species like crabs, lobsters, and fish in both freshwater and saltwater environments. Trap fishing is considered a sustainable practice when managed properly, as it can minimize bycatch and reduce the impact on fish populations compared to other fishing methods.