• RESEARCH HIGHLIGHT

The subterranean form of the Mexican tetra has evolved thrifty genes that allow it to make the most out of infrequent meals.

A Mexican blind cave fish (Astyanax fasciatus mexicanus) in the deep waters of Tamaulipas, Mexico.

The cave-dwelling form of the Mexican tetra cannot see, and uses its eye sockets as repositories for fat. Credit: Barry Mansell/Nature Picture Library

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doi: https://doi.org/10.1038/d41586-022-00982-y

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