A seafood lunch in Hong Kong is enjoyed by locals and visitors alike, but with threatened species on the menu and fishing practices that endanger marine life, campaigners want to change the city's appetite.

Hong Kong is the second-largest consumer of seafood per capita in Asia - an average resident consumes 71.2 kilos of seafood each year, more than four times the global average, according to the World Wide Fund for Nature Hong Kong.

Yet the city of 7 million has been forced to become one of the biggest seafood importers in the world as local waters are depleted of fish stocks.