threadfin

threadfin
/thred"fin'/, n.
any spiny-rayed fishes of the family Polynemidae, having the lower part of the pectoral fin composed of numerous, separate, filamentous rays.
[1885-90; THREAD + FIN]

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fish
 any of about 41 species of marine fishes of the family Polynemidae (order Perciformes), widely distributed along warm seashores, often over sand. Threadfins have two well-separated dorsal fins and a forked tail, and are usually silvery in colour. Their name refers to their pectoral fins, each of which is divided into an upper, normally shaped fin and a lower section consisting of four to seven long, threadlike rays that serve as sensory devices; they are especially long in the young. Most threadfins are 30–60 centimetres (1–2 feet) long; one species, Eleutheronema tetradactylum of India, grow to about 1.8 metres (6 feet) long.

      The name threadfin, or threadfish, may also be applied to the cosmopolitan, warm-water, marine fishes of the genus Alectis (family Carangidae), which also have long, filamentous fin rays, but on the dorsal and anal, rather than pectoral, fins. These rays, also, are more pronounced in the young.

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Universalium. 2010.

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Look at other dictionaries:

  • Threadfin — Thread fin , n. (Zo[ o]l.) Any one of several species of fishes belonging to {Polynemus} and allied genera. They have numerous long pectoral filaments. [1913 Webster] …   The Collaborative International Dictionary of English

  • threadfin — [thredfin΄] n. any of a family (Polynemidae) of marine percoid fishes having a divided pectoral fin that ends in threadlike rays …   English World dictionary

  • Threadfin — Taxobox name = Threadfin image caption = Sixfinger threadfin, Polydactylus sexfilis regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Perciformes familia = Polynemidae subdivision ranks = Genera subdivision = Eleutheronema… …   Wikipedia

  • threadfin — /ˈθrɛdfɪn/ (say thredfin) noun (plural threadfin or threadfins) any of the spiny rayed fishes constituting the family Polynemidae, the lower part of whose pectoral fin is composed of numerous separate, slender, filamentous rays. Usage: For… …  

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  • Threadfin jack — Taxobox name = Threadfin jack image width = 240px regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Perciformes subordo = Percoidei superfamilia = Percoidea familia = Carangidae genus = Carangoides species = C. otrynter binomial …   Wikipedia

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