March 1, 2016 — In 2013, Song Shen Zhen, a 75-year-old resident of Calexico, California, was attempting to re-enter the United States from Mexico when border patrol noticed a strange lump beneath the floor mats of his Dodge Attitude. The plastic bags beneath the mats contained not cocaine, but another valuable product: 27 swim bladders from the totoaba, a critically endangered fish whose air bladders, a Chinese delicacy with alleged medicinal value, fetch up to $20,000 apiece. Agents tracked Zhen to his house, where they discovered a makeshift factory containing another 214 bladders. Altogether, Zhen’s contraband was worth an estimated $3.6 million.
The robust black market is grim news for totoaba — but it’s an even greater catastrophe for vaquita, a diminutive porpoise that dwells solely in the northernmost reaches of the Gulf of California, the narrow body of water that extends between the Baja Peninsula and mainland Mexico. Since 1997, around 80 percent of the world’s vaquitas have perished as bycatch, many in gill nets operated by illegal totoaba fishermen.
Today, fewer than 100 vaquitas remain, earning it the dubious title of world’s most endangered marine mammal. Scientists fear the porpoise could vanish by 2018. “The possible extinction of the vaquita is the most important issue facing the marine mammal community right now,” says Barbara Taylor, a conservation biologist with the U.S. National Oceanic and Atmospheric Administration’s Southwest Fisheries Science Center.
The vaquita — “little cow” in Spanish — is a creature of superlatives. Not only is it the most imperiled cetacean, it is also the smallest, at less than five feet long from snout to tail, and the most geographically restricted: Its entire range could fit four times within Los Angeles’ city limits. Prominent black patches ring its eyes and trace its lips, giving Phocoena sinus a charming, panda-like appearance. The porpoise, which typically travels in pairs or small groups and communicates using rapid clicks, is famously cryptic; conservationists recently went two years without documenting a single sighting. Some Mexican fishermen insist the vaquita is already extinct, photographic evidence notwithstanding.