The vaquita is both the smallest and the most endangered marine mammal in the world. It has been classified as Critically Endangered by the IUCN since 1996, and in 2018, there were only around 6 to 22 vaquitas left. The latest estimate, from July 2019, suggests there are currently only 9. Their biggest threat is from the illegal fishing of totoaba, a large fish in demand because of its swim bladder. Vaquitas accidentally end up entangled in the gillnets set for totoaba and drown because they can no longer swim to the surface to breathe. Conservation efforts led to the introduction of a ban on gillnets in vaquita habitat back in July 2016, but illegal fishing continues, and the threat remains. Efforts now focus on enforcing the ban on gillnets and persecuting those that use them. Conservationists are also working to decrease demand for totoaba, which is a protected species. Read More. 

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