A fish dubbed “gallito” or “little rooster” because of its orange tail lived in just one place: the Teuchitlán River in Mexico. The species had disappeared from the wild by the 1990s, but scientists and local residents have helped bring it back
In this undated photo provided by The Chester Zoo shows two"tequila splitfin" fish in an aquarium at the Chester Zoo in Chester, England. This fish that swam in the spring-fed waters of west-central Mexico disappeared toward the end of the 20th century, however scientists and local residents have achieved the unthinkable: the return of a species extinct in nature, but conserved in captivity, to its native habitat.
The fish began reproducing in aquariums and within a few years Domínguez and his colleagues gambled on reintroducing them to the Teuchitlán river. “They told us it was impossible, when we returned them they were going to die.” There they studied parasites, microorganisms in the water, the interaction with predators, competition with other fish, and then introduced the fish in floating cages.The goal was to re-establish the fragile equilibrium. For that part, the key was not so much the scientists as the local residents.
Some residents made up a nickname for the little fish: “Zoogy.” They made caricatures and formed the “River Guardians,” a group mostly of children. They collect garbage, clean the river and remove invasive plants. The reintroduction into nature of species that were extinct in the wild is complex and time-consuming. Przewalski’s horse and the Arabian oryx are among successful examples. The Chester Zoo said Dec. 29 that the tequila splitfin had joined that small group.
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