Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
thread-fish is a noun meaning "fish having greatly elongated front rays on dorsal and anal fins". It carries one recorded sense.
fish having greatly elongated front rays on dorsal and anal fins
Definitions, synonyms and semantic relations for thread-fish come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.