Editing Threadfin (section)

{{Short description|Family of fishes}}
{{Automatic taxobox
| image = Atlantic threadfin ( Polydactylus octonemus ).jpg
| image_caption = [[Atlantic threadfin]], ''Polydactylus octonemus''
| taxon = Polynemidae
| authority = [[Constantine Samuel Rafinesque|Rafinesque]], 1815<ref name = VDLEF>{{cite journal | author1 = Richard van der Laan | author2 = William N. Eschmeyer | author3 = Ronald Fricke | name-list-style = amp |year=2014 | title = Family-group names of Recent fishes | url = https://biotaxa.org/Zootaxa/article/view/zootaxa.3882.1.1/10480 | journal = Zootaxa | volume = 3882 | issue =2 | pages = 001–230| doi = 10.11646/zootaxa.3882.1.1 | pmid = 25543675 | doi-access = free }}</ref>
| subdivision_ranks = Genera
| subdivision = See text
}}

'''Threadfins''' are silvery grey [[fish]] of the [[Family (biology)|family]] '''Polynemidae''', taxonomically considered a type of [[flatfish]]. Found in tropical to subtropical waters throughout the world, the threadfin family contains eight [[genera]] and about 40 [[species]].<ref name = Nelson5errata>{{cite web | url = https://81a86d48-a-62cb3a1a-s-sites.googlegroups.com/site/fotw5th/Inserts%20for%20pp.%20437-441%20in%20FotW5.pdf?attachauth=ANoY7cru1eiQxyWX8FftCgaTlRq9uD0uYDI1EC32O0iAg-exxLlJoV0tig3JxqIskoE9lDff-FZQgh-HnL2SjOMJcBU3obkvnrkdEJJK-81gj_tCcLedWnb6FgxKVLIY_TGKddKHUVwBuXDEv_JTYPh-mLSQcdVoFfVTHyK-UfvJzknKcwPrwv1Emc1ecKU8OkALrUr6PX_CEHQIjheLBwZ3EwOb7kqz8iSpmirHBGnnbtpJx1aiszU%3D&attredirects=0 | title = Inserts for pages 437–441 | access-date = 13 April 2020 | publisher = John Wiley & Sons Limited}}</ref> An unrelated species sometimes known by the name threadfin, ''Alectis indicus'', is properly the [[Indian threadfish]] (family [[Carangidae]]).

Ranging in length from {{convert|11|cm|in|abbr=on|round=0.5}} in the [[dwarf threadfin]] (''Parapolynemus verekeri'') to {{convert|2|m|ft|abbr=on}} in [[fourfinger threadfin]] (''Eleutheronema tetradactylum'') and [[giant African threadfin]] (''Polydactylus quadrifilis''), threadfins are both important to commercial [[fishery|fisheries]] as a food fish, and popular among [[fishing|angler]]s. Their habit of forming large schools makes the threadfins a reliable and economic catch.