The Pez Graso is a species of catfish endemic to Lake Tota in Colombia. It was last seen in 1957 and is part of Re:wild's top most wanted lost species list. It is listed as critically endangered (possibly extinct) by the IUCN. This market will resolve YES if the Pez Graso is declared extinct by the IUCN by 2100 or earlier, and NO if it is not declared extinct by the IUCN in 2100.
Wikipedia
https://en.wikipedia.org/wiki/Rhizosomichthys_totae
IUCN Red List of Threatened Species Assessment: Critically endangered (possibly extinct)
https://www.iucnredlist.org/species/19661/61472482
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