In this Sept. 2018 handout photo released by El Museo de la Ballena y Ciencias del Mar, a pair of critically endangered vaquita porpoises swim in the Gulf of California. Experts called on Mexico to use floating barriers to enclose a small area of the Gulf of California where a half dozen vaquitas were sighted in September. (Oscar Ortiz/Museo de la Ballena y Ciencias del Mar via AP)
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