conservationists in mexico, assisted by scientists at chester zoo, have brought a species of fish thatch is silver and less than three inches long — has now been returned to its native habitat in the south—west of the country. here's our science correspondent, victoria gill. a little known species with an extraordinary story. the tequila fish is a small freshwater fish that lives in the rivers and lakes of south—west mexico, but it has been missing, presumed extinct, for more than a decade. and it is just one of thousands of aquatics creatures that are facing extinction but that have slipped under the radar. small little things, but show sometimes a bit of colour when they breed, but not much interest on the global conservation aspect. now, with the help of conservationists at chester zoo, scientists in mexico have reversed that extinction, bringing captive—bred fish back to the wild. the team has now confirmed that the fish are breeding and that the population is recovering here. they are doing well. they started with the introduction of 1500 animals, so now we're about from 1500 indi

now, with the help of conservationists at chester zoo, scientists in mexico have reversed that extinction fish are breeding, and that the population is recovering here. they're doing well. they started with the introduction of 1500 animals, so now we're talking about from 1500 individuals now, to tens of thousands, and now what we're seeing is that the species is slowly start expanding to the river system, which is exactly what we wanted. so that is a very good start, and hopefully that will be more species looking forward. among the estimated one million species under threat around the world, a third of wildlife that depends on freshwater habitats, are sliding towards extinction. and the ongoing loss of clean, healthy rivers and lakes threatens our food and water supplies too. so here injalisco, mexico, the community stepped in. local people trained with the scientists to take on long—term monitoring of this vital river network, to ensure it is clean and healthy for both people and wildlife. it would be impossible without the local community. the local people are the main actors in the l

anchor: conservationists at chester zoo in england have held experts in -- helped experts in mexico reintroducecies of fish that was previously declared extinct back to the wild. the freshwer tequila fish has now been returned to its native habitat in southwest mexico. our signs correspondent has the details. -- science correspondent has the details. reporter: a little known species with an extraordinary story, it is a for small fish that lives in the rivers and lakes of southwest mexico. but it has been missing, presumed extinct, for a decade. it is one of thousands of aquatic creatures facing extinction that have slipped under the radar. >> sometimes a bit of color when they breed but not much in terms of the global conservation aspect. reporter: with the help of conservationists, scientists have reversed that extension, bringing captive bred fish back to the wild. the team has confirmed that the fish are breeding in the population is recovering. >> they are doing well. they started with 1500 animals. now tens of thousands. we see the species is starting to expand to the river system. that is

now with the help of conservationists at - help of conservationists at chester zoo, the extension hasion is recovering.— and the population is recoverint. , ., ., recovering. they are doing well. it started _ recovering. they are doing well. it started with - recovering. they are doing well. it started with 1500 | well. it started with 1500 animals, and now we're about tens of thousands and the species is slowly expanding to the river system which is exactly what we wanted so that is a very good start. an is a very good start. an estimated _ is a very good start. an estimated 1 _ is a very good start. an estimated 1 million species under threat at the moment, one third that depends on freshwater habitats are sliding towards extension. the ongoing loss of clear, healthy rivers and lakes threatens out food and lakes threatens out food and water supply as well. so here in jalisco, and water supply as well. so here injalisco, the community stepped in, taking on long—term monitoring to ensure the system is clean and healthy for both people and the wildlife. it would be impossible without t