butterfish

Any of various species of fish having a slippery mucous coating, especially

Perciform fish of the family Stromateidae, including the genera Pampus, Peprilus and Stromateus.

Any of various species of fish having a slippery mucous coating, especially

A rock gunnel, Pholis gunnellus, an eel-like fish found in the intertidal and subtidal zones of the North Atlantic.

Any of various species of fish having a slippery mucous coating, especially

The New Zealand fish Odax pullus, also known as greenbone.

Any of various species of fish having a slippery mucous coating, especially

The Murray perch, Oligorus mitchelli; an Australian perciform fish of Murray river, now known as trout cod, Maccullochella macquariensis http://www.fishbase.org/Nomenclature/SynonymsList.php?ID=6308&SynCode=26048&GenusName=Maccullochella&SpeciesName=macquariensis, http://www.fishbase.org/summary/Maccullochella-macquariensis.html.

A sablefish (Anoplopoma fimbria).