The subterranean form of the Mexican tetra has evolved thrifty genes that allow it to make the most out of infrequent meals.
Some populations of the small fish called the Mexican tetra live in streams; other populations of the fish (Astyanax mexicanus) live in about 30 Mexican caves. On the rare occasions when bats or seasonal flooding bring food into their caves, the blind, pale cavefish can take advantage of the bounty by storing vast amounts of fat.
Subscribe to Nature+
Get immediate online access to the entire Nature family of 50+ journals
Subscribe to Journal
Get full journal access for 1 year
only $3.90 per issue
All prices are NET prices. VAT will be added later in the checkout. Tax calculation will be finalised during checkout.
Get time limited or full article access on ReadCube.