Prior work identified a sauropod as Job's behemoth. Although not possible from the standpoint of secular history, Biblical Creation positions the majority of Earth's fossils as deposits from Noah's Flood. As with the behemoth, it thus opens the possibility of identifying Job's leviathan (Job 41) as an extinct creature. Arguments in favor of Job's leviathan as a real animal are presented. Next, features from four candidate animals are compared with anatomical and behavioral hints from Job 41. We find that a new description of an extinct non-dinosaur reptile named Deinosuchus offers heretofore unknown anatomical details that commend it as a top candidate for a literal leviathan. Finally, a few theological implications of identifying Job's leviathan as a historical animal are explored.