The Alabama Sturgeon, thought to be extinct, has been proved to still exist in the Alabama River by scientists. The giant sturgeon in the photo shown here was caught in the Cahaba River near Centreville, AL in 1941. Details of the story are here: http://www.al.com/news/mobile/index.ssf/2016/08/the_alabama_sturgeon_lives_fea.html#incart_river_mobileshort__river_mobileshort_home
Scientists Discover Evidence of Believed Extinct Alabama Sturgeon
DNA Evidence Discovered in the Alabama River