Sicydiinae

{{Short description|Subfamily of fishes}}

{{Automatic taxobox

| image_alt =

| image =Sicyopterus japonicus.jpg

| image_caption = Sicyopterus japonicus

| taxon = Sicydiinae

| authority = T. N. Gill, 1860

| subdivision_ranks = Genera

| subdivision = See text

}}

The Sicydiinae are a small subfamily (about 118 species) of freshwater gobies, with only nine genera.{{Cite journal | last1 = Keith | first1 = P. | last2 = Marquet | first2 = G. | last3 = Taillebois | first3 = L. | doi = 10.1080/00222933.2011.602479 | title = Discovery of the freshwater genus Sicyopus (Teleostei: Gobioidei: Sicydiinae) in Madagascar, with a description of a new species and comments on regional dispersal | journal = Journal of Natural History | volume = 45 | issue = 43–44 | pages = 2725 | year = 2011 | bibcode = 2011JNatH..45.2725K }} They are usually found in fast-moving mountain streams in tropical islands. They are characterized by highly developed rounded suction discs and an amphidromous lifecycle. Adult lengths range from {{convert|2|to|15|cm|in|abbr=on}}.{{cite journal|author1=Ronald E. Watson |author2=Maurice Kottelat |name-list-style=amp |year=2006|title=Two new freshwater gobies from Halmahera, Maluku, Indonesia (Teleostei: Gobioidei: Sicydiinae)|journal=Ichthyological Exploration of Freshwaters |volume=17|issue=2|pages=121–128}}{{cite journal|author1=Ronald E. Watson |author2=Philippe Keith |author3=Gérard Marquet |name-list-style=amp |year=2007|title=Akihito vanuatu, a new genus and new species of freshwater goby (Sicydiinae) from the South Pacific|journal=Cybium|volume=31|issue=3|pages= 341&–349|url=http://www.mnhn.fr/sfi/cybium/numeros/313/06.Watson%20448.pdf}}{{Cite book | last1 = Keith | first1 = P. | last2 = Lord | first2 = C. | editor-first= B. G.|editor-last= Kapoor | doi = 10.1201/b11397-11 | chapter = Systematics of Sicydiinae | title = The Biology of Gobies | pages = 119 | year = 2011 | isbn = 978-1-57808-436-4 }} Some species are popular in the aquarium trade.{{cite journal|author=Tony H.M. Nip|year=2010|title=First records of several sicydiine gobies (Gobiidae: Sicydiinae) from mainland China|journal=JoTT Communication|volume=2|issue=11|pages=1237–1244|url=http://threatenedtaxa.org/ZooPrintJournal/2010/October/o243926x101237-1244.pdf}} The genera included under Sicydiinae are:{{cite web|url=http://www.gobiidae.com/gobiidae_system/taxons.php?taxonid=594&parentid=588&taxontype=SF|title= Sicydiinae |author=James Van Tassell|publisher=Gobiidae Research Institute |access-date=February 28, 2012}}

:*Akihito Watson, Keith, and Marquet, 2007

:*Cotylopus Guichenot, 1863

:*Lentipes Günther, 1861

:*Parasicydium Risch, 1980

:*Sicyopterus Gill, 1860

:*Sicyopus Gill, 1863

:*Stiphodon Weber, 1895

:*Sicydium Cuvier & Valenciennes, 1837