Abraham Sapien, born Langdon Everett Caul, is a fictional character introduced 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 "Abe" Lincoln, on whose assassination date the Oannes Club abandoned Abe's body, leaving only a cryptic note as explanation, in a suspended animation tank beneath a Washington D.C. hospital. He is occasionally referred to as an "amphibious man."