simenchelys parasiticus

from The Collaborative International Dictionary of English v.0.48

Pug nose \Pug" nose`\
   A short, thick nose; a snubnose. -- {Pug"-nosed`}, a.
   [1913 Webster]

   {Pug-nose eel} (Zool.), a deep-water marine eel ({Simenchelys
      parasiticus}) which sometimes burrows into the flesh of
      the halibut.
      [1913 Webster]