Wildlife traffickers sell the bladder of the Totoaba fish in China and Hong Kong for up to $200,000.
The fish is listed as an endangered species and is protected under the Convention on International Trade and Endangered Species.
The bladder is considered a delicacy in China and is used in fish maw soup. Consumers believe that the bladder helps improve blood circulation, skin complexion, and fertility.
Source: Associated Press, “7 charged with smuggling bladders of endangered fish to China, elsewhere for use in soup,” Washington Post, April 24, 2013.