A Fish Returns from Extinction | Un Pez que Vuelve de la Extinción

By Erbol:

SURVIVES ECOLOGICAL DISASTER

Rediscovery of Moema claudiae, Bolivian fish on the Red List of extinction; urgent protection requested

Rivulids, including Moema claudiae, are vulnerable species. Photo/Nature Conservation.

A recent study published in the journal Nature Conservation, carried out by researchers Heinz Arno Drawert and Thomas Otto Litz, confirmed the discovery of a new population of Moema claudiae in a small temporary pond located within a remnant of forest surrounded by vast croplands in the department of Beni.

The discovery is of special importance, since the species appeared on the Red List of the International Union for Conservation of Nature (IUCN 2025) as Critically Endangered and possibly extinct, because it had not been recorded for more than two decades.

The finding was made about 100 kilometers northwest of the type locality, a site that had been completely destroyed by agricultural expansion, deforestation, and the modification of hydrological systems.

At this new location, the researchers identified the specimens based on the diagnostic traits described in the scientific literature, including the characteristic vertical black spot found on the males.

The photographs obtained represent the first images of this species alive; the specimens were deposited in the Ichthyological Collection of the Noel Kempff Mercado Natural History Museum.

Experts highlight that rivulids, including Moema claudiae, are especially vulnerable to anthropogenic activities due to their restricted geographic distribution, their dependence on temporary habitats, and their low recolonization capacity.

Intense deforestation recorded in recent decades has drastically reduced the seasonal wetlands these fish need to survive.

The area where the new population was recorded lies in a landscape pressured by agro-industrial expansion, which increases the risk for the species and for the diversity of seasonal killifish that coexist there.

The study emphasizes that this finding could change the fate of Moema claudiae, as it shows that it still persists in the wild despite the threats it faces.

The researchers urge that this area be protected urgently, since it constitutes the only known locality with confirmed presence of the species and one of the sites with the greatest diversity of rivulids in South America.

The extensive research concludes by noting that this rediscovery opens new hope for preventing this Bolivian fish from returning to the brink of extinction.

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