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Swimming Vaquita

A vaquita pops its head out of the water.
Credit: VaquitaCPR, Jonas Teilmann

Vaquitas were unknown to science until three skulls were found on a Mexican beach in 1950 – 1951. Scientists were not able to study the vaquita until a few were accidentally caught in gillnets in 1986. The vaquita was designated as Critically Endangered in 1990, but little else was known about its biology.