Lobster trap or lobster pot is a portable trap that traps lobsters or crayfish and is used in lobster fishing. In Scotland (chiefly in the north), the word creel is used to refer to a device used to catch lobsters and other crustaceans. A lobster trap can hold several lobsters. Lobster traps can be constructed of wire and wood, or metal and netting or rigid plastic. An opening permits the lobster to enter a tunnel of netting or other one-way device. Pots are sometimes constructed in two parts, called the "chamber" or "kitchen", where there is bait, and exits into the "parlour", which prevents escape. Lobster pots are usually dropped to the sea floor, one or more at a time, sometimes up to 40 or more, and are marked by a buoy so they can be picked up later. The lobster trap was invented in 1808 by Ebenezer Thorndike of Swampscott, Massachusetts Crayfish is a Freshwater (related) lobster The Lobster Liberation Front (LLF) is an animal rights campaign which first appeared on the coast of Dorset, England in 2004, later spreading to Wales and Scotland. Their methods include releasing lobsters in live storage and sabotaging lobster pots or fishing boats. The LLF consider boiling lobsters alive (the traditional method for cooking them) unacceptable and use direct action to prevent it. Their claim that lobsters, which possess a rudimentary nervous system, can feel pain, is the subject of ongoing scientific debate