The vaquita was not scientifically described until 1958, with full descriptions of external morphology not available until 1987.
Sources: (Mungia-Vega, Esquer-Garrigos, Rojas-Bracho, Vazquez-Juarez, Castro-Prieto, & Flores-Ramirez, 2007; Norris & McFarland, 1958)
Image: Noelle M. Brooks
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