Pelican Eels can grow up to a meter in length, with a large portion of that taken up by its massive head. Their mouths have hinged jaws that would allow them to eat fish much larger than themselves. Their stomachs stretch as well, though interestingly, they have very small teeth. This, combined with found stomach contents, demonstrates that Pelican Eels primarily eat small crustaceans.
Not much else is really known about these strange fish. They live so far down that we only really get to study specimens that get accidentally caught by fishermen. They have need been evaluated by IUCN.