The totoaba (Totoaba macdonaldi) is a large species of fish native to the Gulf of California in Mexico. Like the vaquita, it is listed on the IUCN Red List of Threatened Species as “critically endangered”. Illegal fishing has driven this species to the brink of extinction and as the gill-nets used in this fishery allow vaquita to get entangled, it is also responsible for the vaquita’s decline. The totoaba is being sought after for its swim bladder, which is considered a delicacy in China where a single swim bladder can command a price of $46,000 per kg (2019) on the Chinese black market.