There once was a small fish called “tequila splitfin” or “zoogoneticus tequila” that swam in a river in western Mexico, but disappeared in the 1990s. Scientists and residents, however, have achieved the return of a species extinct in nature—but conserved in captivity—to its native habitat.
Click here for original story, Mexican fish extinct in wild successfully reintroduced
Source: Phys.org