The CrustaStun is a device designed to administer a lethal electric shock to

shellfish Shellfish is a colloquial and fisheries term for exoskeleton-bearing aquatic invertebrates used as food, including various species of molluscs, crustaceans, and echinoderms. Although most kinds of shellfish are harvested from saltwater env ...

(such as

lobsters Lobsters are a family (Nephropidae, synonym Homaridae) of marine crustaceans. They have long bodies with muscular tails and live in crevices or burrows on the sea floor. Three of their five pairs of legs have claws, including the first pair, ...

crabs Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting " tail" ( abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in al ...

, and

crayfish Crayfish are freshwater crustaceans belonging to the clade Astacidea, which also contains lobsters. In some locations, they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, rock lobsters, ...

) before cooking. This avoids boiling a live shellfish which may be able to experience pain in a way similar to vertebrates. The CrustaStun comprises a stainless-steel box approximately the size of a domestic

microwave oven A microwave oven (commonly referred to as a microwave) is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range. This induces polar molecules in the food to rotate and produce ...

containing a tray with a wet sponge and an electrode. The shellfish is placed in the box and when the lid is closed, the wet sponge conducts the current which electrocutes the animal with a 120

volt The volt (symbol: V) is the unit of electric potential, electric potential difference ( voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827). D ...

2–5

amp #REDIRECT Amp {{Redirect category shell, {{R from other capitalisation{{R from ambiguous page ...

current. It is reported the CrustaStun renders the shellfish unconscious in 0.3 seconds and kills the animal in 5 to 10 seconds, compared to 3 minutes to kill a lobster by boiling or 4.5 minutes for a crab. The inventor of the device, Simon Buckhaven, worked for two years with scientists from the

University of Bristol The University of Bristol is a Red brick university, red brick Russell Group research university in Bristol, England. It received its royal charter in 1909, although it can trace its roots to a Society of Merchant Venturers, Merchant Venturers' sc ...

to develop the device which is manufactured by a company in

England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe ...

, at an estimated cost of £2,500 (in 2009). There are claims that shellfish killed with the CrustaStun taste better than those killed by boiling.

Waitrose Waitrose & Partners (formally Waitrose Limited) is a brand of British supermarkets, founded in 1904 as Waite, Rose & Taylor, later shortened to Waitrose. It was acquired in 1937 by employee-owned retailer John Lewis Partnership, which still se ...

Tesco Tesco plc () is a British Multinational corporation, multinational groceries and general merchandise retailer headquartered in Welwyn Garden City, England. In 2011 it was the third-largest retailer in the world measured by gross revenues an ...

and other major supermarkets in the United Kingdom have insisted that all shellfish products supplied to them are killed using this method.

See also

References

Further reading