The tiny Spring Pygmy Sunfish, Elassoma alabamae, is endemic restricted to just 2 small springs in northern Alabama. It is considered to be critically endangered by the IUCN. Image credit: Conservation Fisheries

The tiny Spring Pygmy Sunfish, Elassoma alabamae, is endemic restricted to just 2 small springs in northern Alabama. It is considered to be critically endangered by the IUCN. Image credit: Conservation Fisheries