Albright Grove Brewing Company will host a viewing Wednesday, Sept. 29 of “Hidden Rivers,” a documentary detailing the smaller, gilled denizens of Southern Appalachian creeks, rivers and streams and the threats they face.

The screening of “Hidden Rivers” by Freshwaters Illustrated is planned for 6 p.m. at Albright Grove Brewing, 2924 Sutherland Ave. in Knoxville.

“This film aims to show off the stunning freshwater biodiversity of the Southern Appalachian region, and to highlight conservation efforts, beauty, and vulnerability of these ecosystems,” according to Conservation Fisheries, a Knoxville-based nonprofit geared toward the preservation of native Appalachian fishes and their ecosystems.

Conservation Fisheries is in its 35th year of breeding, sharing and releasing broods of threatened fishes collected from points ranging from the Conasauga River to Little River and beyond.