HolcomycteronusHolcomycteronus is a genus of cusk-eels. It includes Holcomycteronus profundissimus, long thought to be the deepest-living fish in the world's oceans.SpeciesThere are currently six recognized species in this genus. Many were formerly considered species of Neobythites or Grimaldichthys.Holcomycteronus aequatoris Holcomycteronus brucei Holcomycteronus digittatus Garman, 1899Holcomycteronus profundissimus Holcomycteronus pterotus ''Holcomycteronus squamosus''