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Blind cave fish offers lessons in how to survive starvation

Unlike most other animals, the cave-dwelling Mexican tetra doesn’t get a fatty liver when it is malnourished – and its secrets could lead to medical benefits for other species

By Claire Ainsworth

11 March 2024

Cave-dwelling Mexican tetra fish can endure periods of starvation

VPC Animals Photo / Alamy

A blind cave-dwelling fish that ekes out a meagre existence on bat droppings has helped scientists tackle a medical paradox: how prolonged starvation can cause people to develop a fat-filled liver, which is usually associated with obesity. The finding could give insights into the mechanisms of how malnutrition damages our bodies.

The liver has long been known to be harmed in a kind of malnutrition called kwashiorkor, which features…

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