ESharks that are endangered are routinely sold to unimportant customers in fish and chips stores, an investigation reveals.
Scientists have tested meat under umbrellas, such as huss, rock salmon and rock eel, finding the majority of sharks, including those born in Britain, which are protected due to declining numbers.
The investigation also tested fish samples by fishermen and wholesale fishermen, finding evidence of imported hammers that were subject to restrictions on international trade because of their "endangered" status.
The Exeter University team, which used DNA gambling techniques to determine which types of samples came out, said the results showed it was "impossible" for consumers to know what they were buying.
They called for stricter food labels, so people know what types of food they eat.
The shark, most commonly found to be sold in fish and chips, was a chicken fur, which was illegal to catch Europe by 2011.
However, fish can now be sold as a trailer, which is allowed if they are caught in networks that are targeted to other species.
Other sharks sold in fish and chip shops and fishermen include stellar smooth hounds, nursehounds and blue sharks.
"The discovery of endangered shark sharks highlights the widespread sales of descending species – even reaching Europe and the United Kingdom," says Dr. Andrew Griffiths, co-author of the study.