What does butterfish mean?
Butterfish is a noun naming any of several small marine fishes distinguished by their oily, butter-rich flesh and smooth, slippery bodies. In North America the term most often refers to Peprilus triacanthus, a flat-bodied silver fish caught along the Atlantic coast, while in Britain it typically denotes the rock gunnel, a slender eel-like fish that hides among seaweed in tide pools. The word's culinary associations are strong: butterfish cooks up moist and flavourful thanks to its natural oils, so it appears frequently on seafood menus and in coastal markets, usually grilled, broiled, or pan-seared as whole fish or fillets. Because several distinct species share the name across regions, buyers should confirm exactly which fish they are getting. The compound is transparently formed from 'butter' plus 'fish', reflecting both the texture of the flesh and its mild, delicate taste.
nounAny of various small, oily-fleshed marine fishes with slippery skin or rich, butter-tasting flesh; in North America chiefly Peprilus triacanthus of the Atlantic coast, and in Britain the rock gunnel (Pholis gunnellus) of tide pools.
- The small Atlantic food fish Peprilus triacanthus (family Stromateidae), prized for its soft, oily flesh.
- Any of various other small fishes called 'butterfish', including the European and North American rock gunnel (Pholis gunnellus) found in tide pools.
"The chef seared the butterfish until its delicate, oil-rich flesh turned golden."
"At the seaside market, the day's catch included mackerel, herring, and a crate of glistening butterfish."
"Rock-poolers on the Cornish coast often spot a butterfish coiled beneath a strand of seaweed at low tide."
Like many fish names, 'butterfish' is often left unchanged in the plural, especially when referring to the catch or to food; 'butterfishes' appears when counting individual specimens or distinguishing species.
"The trawler landed hundreds of butterfish that morning."
Butterfish earned its name honestly: its flesh is so naturally oily and tender that it practically bastes itself when cooked.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of butterfish
Butterfish is a straightforward English compound formed from 'butter' — ultimately from Latin butyrum via Old English — and 'fish', coined to describe fishes whose oily, meltingly tender flesh resembles butter. The name arose independently among English-speaking fishing communities on both sides of the Atlantic, which is why it came to be applied to different species in Britain and North America. Its transparent construction makes it part of the wider family of descriptive fish names built from familiar foods or qualities.
Related word forms
How butterfish is actually used
The name covers several unrelated species in different regions, so the exact fish meant depends on locality: in North America it usually denotes Peprilus triacanthus, while in British usage it commonly means the rock gunnel. Because of this ambiguity, some restaurants use the term loosely for other rich, oily fish such as escolar.
Easily confused with butterfish
A butterflyfish is a brightly coloured tropical reef fish of the family Chaetodontidae, whereas a butterfish is a small oily food fish valued for eating.
Escolar is an unrelated deep-sea species whose rich flesh is sometimes marketed as 'butterfish' in restaurants, but true butterfish refers to the small Atlantic fish Peprilus triacanthus.