Checkered pupfish

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Cualac tessellatus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cyprinodontiformes
Family: Cyprinodontidae
Genus: Cualac
R. R. Miller, 1956
Species: C. tessellatus
Binomial name
Cualac tessellatus
R. R. Miller, 1956

The checkered pupfish (Cualac tessellatus) is a species of pupfish endemic to Mexico where it is found in the state of San Luis Potosi. This species grows to a length of 8 centimetres (3.1 in) TL. It is the only known member of its genus and can be found in the aquarium trade.