Almost two years ago, researchers from the Tennessee Aquarium and the U.S. Fish and Wildlife captured several specimens of the Conasauga Logperch, one of the rarest darters in North America. On Friday, after a long process of breeding and building a small population of the endangered fish, the researchers released a group of young logperch back into the river. Middle school students from Valley Point Middle School in Whitfield County were on hand for the release.