Abraham Sapien, born Langdon Everett Caul, is a fictional character in the comic book series Hellboy, created by Mike Mignola. He takes his name from "Ichthyo sapien", the fanciful species designation chosen for him by his colleagues in the 19th-century Oannes Club, and from Abraham Lincoln, on whose assassination date the Oannes Club abandoned Abe's body in a suspended animation tank beneath a Washington D.C. hospital, leaving only a cryptic note as explanation. He is occasionally referred to as an "amphibious man."