What does butterflyfish mean?
The butterflyfish is any of a large group of small, vividly coloured tropical marine fishes belonging to the family Chaetodontidae. Named for the bright, often banded patterns that recall a butterfly's wings, these fish are among the most recognisable inhabitants of coral reefs throughout the world's tropical oceans. They typically have deep, flattened, disc-like bodies, continuous dorsal fins, and small protrusible mouths suited to picking at coral polyps, tiny invertebrates, and zooplankton. Many species bear a dark stripe across the eye or a false eyespot near the tail, thought to confuse predators. Butterflyfish are popular subjects for divers and underwater photographers and are occasionally kept in aquaria, though some species are difficult to feed. In everyday language the word appears almost entirely in natural-history, diving, and aquarium contexts, with no figurative use. The plural may be given as butterflyfish or butterflyfishes, both forms being accepted.
nounA small, brightly coloured tropical marine fish of the family Chaetodontidae, found mainly on coral reefs and noted for its laterally compressed, disc-like body and often eye-catching patterns.
- Any of numerous small tropical marine fishes of the family Chaetodontidae, characterized by deep, compressed, often brilliantly patterned bodies, inhabiting coral reefs.
"A pair of raccoon butterflyfish glided past the coral head, their yellow bodies flashing in the sunlight."
"The masked butterflyfish hovered motionless beside a fan of staghorn coral."
"Reef surveys along the coast recorded over twenty species of butterflyfish within a single kilometre."
Both plurals are accepted; the unchanged form butterflyfish is common in scientific writing, while butterflyfishes also appears regularly.
"Several butterflyfish were feeding near the reef crest."
Many butterflyfish have a dark stripe running through the eye, a built-in decoy that tricks predators into attacking the wrong end.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of butterflyfish
The word butterflyfish is a compound formed simply from 'butterfly' plus 'fish', coined in English by analogy with the insect whose colourful wing patterns the fish resembles. 'Butterfly' itself derives from Old English 'buttorfleoge'. The scientific family name Chaetodontidae comes from Greek 'chaite' (bristle) and 'odous' (tooth), referring to the brush-like teeth characteristic of these fishes. The common name has been in use since at least the eighteenth century as European naturalists catalogued tropical reef fauna.
How butterflyfish is actually used
Butterflyfish is used almost exclusively in natural-history, aquarium, and diving contexts; it carries no figurative or colloquial usage. The plural may be written either as butterflyfish (unchanged) or butterflyfishes, both being accepted.
Easily confused with butterflyfish
Angelfish are a different reef family (Pomacanthidae) with larger, more angular bodies; butterflyfish are smaller, more disc-shaped, and typically lack the spiny dorsal fin profile of angelfish.