Fish trap is a device used to catch fish. They are placed in water and left there until fish falls into a trap or until fisherman decides to move it. Traps are useful because fishermen don’t have to sit beside them and waste time if they have something better to do. They can just set the trap and check it back later.
Almost every civilization that fished invented a fish trap of its own. Fishing has two general forms: fixed and portable. Fixed are made in the form of a fishing weir. They are obstacles placed in the water that direct the passage of fish into a part where they will be trapped and from where they can’t escape. They are traditionally built from wood or stones and stay in water until disassembled. Portable traps are made in a bottle shape and can be taken out of the water. They have a narrow opening through which a fish can enter but cannot exit. They also sometimes have bait inside but can work without it.
Yaghan people, who inhabited the Tierra Del Fuego in prehistoric times, made fixed stone traps in shallow inlets. This kind of trap caught the fish when the tide retreats. Indigenous Australians also built stone traps which caught huge numbers of migratory fish. These consisted of system of canals on different level (some were more than 2 km long) which trapped eels when the water level rose and fell.
Different traps are in use, depending on a type of fish that fishermen tray to catch and local conditions.
Here are some of fish trap types: