Shark fin is traditionally served at Chinese wedding banquets and occasions when the host wants to impress guests with expensive and unusual dishes. Some also believe it is good for health.
The UN Food and Agricultural Organisation estimates 100 million sharks are caught each year, though experts say the real figure could be twice that, leading to a dramatic drop in the populations of some species.
"If you can stop people consuming shark fin soup, it would relieve a huge pressure on the species," Steve Trent, president of conservation group WildAid, told Reuters at the unveiling of the survey.
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