List of smallest fish

{{Short description|None}} The world's smallest fish depends on the measurement used.<ref name=AUMuseum>{{cite news| author=McGrouther, M. | url=https://australianmuseum.net.au/fwhat-is-the-smallest-fish | title=What is the smallest fish? | work=Australian Museum | date=15 August 2011 | accessdate=24 September 2017 }}</ref>

Based on minimum standard length at maturity the main contenders are ''Paedocypris progenetica'' where females can reach it at {{convert|7.9|mm|abbr=on}},<ref name =Schoolastic>[http://www2.scholastic.com/browse/article.jsp?id=11044 Scholastic news online:''The World's Smallest Fish?'' by: Ezra Billinkoff-] Retrieved February 3, 2006</ref><ref name=Eyepod>[http://www.eyepod.org/EA-NS-3-Wrlds-SmllstFish.html Eyepod.org-''Worlds Smallest Fish Discovered in Acidic Swamp''.''New spineless species...''These pages are dedicated to explorer Julie "Brook" Thornton] Retrieved January 25</ref><ref name=Pprogenetica/> the stout infantfish (''Schindleria brevipinguis'') where females reach it at {{convert|7|mm|abbr=on}} and males at {{convert|6.5|mm|abbr=on}},<ref name=AUMuseum/> and ''Photocorynus spiniceps'' where males can reach it at {{convert|6.2|mm|abbr=on}}, but are attached to the far larger females.<ref name=Pietsch/><ref>{{cite news| url=http://seattletimes.nwsource.com/html/localnews/2002772852_tiniestfish31m.html| title=Catch of the day: Researcher stakes claim to tiny-fish title| work=The Seattle Times| date=January 31, 2001| accessdate=2 February 2006| first=Sandi|authorlink=Sandi Doughton| last=Doughton| archiveurl=https://web.archive.org/web/20080518020614/http://seattletimes.nwsource.com/html/localnews/2002772852_tiniestfish31m.html| archivedate=18 May 2008| url-status=dead}}</ref> If judging smallest based on the species' maximum size (a measurement often used for fish), ''Paedocypris progenetica'', dwarf pygmy goby (''Pandaka pygmaea''), midget dwarfgoby (''Trimmatom nanus'') and the stout infantfish (''Schindleria brevipinguis'') are not known to exceed {{convert|11|mm|abbr=on}} in standard length,<ref name=Pprogenetica/><ref name=Ppygmaea/><ref name=Tnanus/><ref name=Sbrevipinguis/> and the two ''Leptophilypnion'' sleeper gobies are less than {{convert|10|mm|abbr=on}}.<ref name=Roberts2013/> A level of uncertainty about the full size range exists for some of these, as only a few specimens have been measured.<ref name=Roberts2013/>

Little or no data is available on weight of most of these, but at less than {{convert|1|mg|g|3}} it is likely that the stout infantfish (''Schindleria brevipinguis'') is the smallest if using this feature.<ref name=AUMuseum/>

==List of smallest fish in the world== {| class="sortable wikitable" |- style="background:#ececec;" !Image !Common name !Species !Family !Standard length of smallest known mature individual !Maximum known standard length |- |100px |Dwarf goby |''Paedocypris progenetica'' |Cyprinidae |{{convert|7.9|mm|abbr=on}}, female<ref name=Pprogenetica>{{FishBase species | genus = Paedocypris | species = progenetica | month = September| year = 2017}}</ref> |{{convert|10.3|mm|abbr=on}}<ref name=Pprogenetica/> |- |100px | |''Danionella translucida'' |Cyprinidae |10 mm <ref name=":0">{{Cite journal |last=Britz |first=Ralf |date=2021 |title=The emerging vertebrate model species for neurophysiological studies is ''Danionella cerebrum'', new species (Teleostei: Cyprinidae) |journal=Scientific Reports |volume=11 |issue=1 |article-number=18942 |doi=10.1038/s41598-021-97600-0 |pmid=34556691 |pmc=8460714 |bibcode=2021NatSR..1118942B }}</ref> |15 mm<ref name=":0" /> |- |100px | |''Danionella cerebrum'' |Cyprinidae |10 mm<ref name=":0" /> |12.6 mm<ref name=":0" /> |- | | |''Leptophilypnion fittkaui'' |Eleotridae |? |{{convert|9.5|mm|abbr=on}}<ref name=Roberts2013>{{cite journal|author=Roberts, T.R. |year=2013 |title=''Leptophilypnion'', a new genus with two new species of tiny central Amazonian gobioid fishes (Teleostei, Eleotridae)|journal=Aqua, International Journal of Ichthyology|volume= 19 |issue=2|pages= 85–98}}</ref> |- | | |''Leptophilypnion pusillus'' |Eleotridae |? |{{convert|9.1|mm|abbr=on}}<ref name=Roberts2013/> |- |100px |Dwarf pygmy goby |''Pandaka pygmaea'' |Gobiidae |{{convert|9|mm|abbr=on}}, male<ref name=Ppygmaea>{{FishBase species | genus = Pandaka | species = pygmaea| month = September| year = 2017}}</ref> |{{convert|11|mm|abbr=on}}<ref name=Ppygmaea/> |- | |Midget dwarfgoby |''Trimmatom nanus'' |Gobiidae |{{convert|10|mm|abbr=on}}<ref name=Tnanus>{{FishBase species | genus = Trimmatom | species = nanus| month = September| year = 2017}}</ref> |{{convert|10|mm|abbr=on}}<ref name=Tnanus/> |- |100px | |''Photocorynus spiniceps'' |Linophrynidae |{{convert|6.2|mm|abbr=on}}, male<ref name=Pietsch>{{cite journal|title=Dimorphism, parasitism, and sex revisited: modes of reproduction among deep-sea ceratioid anglerfishes (Teleostei: Lophiiformes)|author=Theodore W. Pietsch|journal=Ichthyological Research|volume=52|issue=3|year=2005|pages=207–236|doi=10.1007/s10228-005-0286-2|bibcode=2005IchtR..52..207P |s2cid=24768783}}</ref> |{{convert|50.2|mm|abbr=on}}, female far larger than male and species not among smallest by maximum standard length<ref name=Pietsch/> |- | |Stout infantfish<ref name ="Scripps Institution of Oceanography">{{cite press release |url=https://scripps.ucsd.edu/news/scientists-describe-worlds-smallest-lightest-fish |title=Scientists Describe the World's Smallest, Lightest Fish|date=July 20, 2004|access-date= September 17, 2011|publisher=University of California San Diego}}</ref> |''Schindleria brevipinguis'' |Gobiidae |{{convert|6.5|mm|abbr=on}}, male<ref name=AUMuseum/> |{{convert|10|mm|abbr=on}}<ref name=Sbrevipinguis>{{FishBase species | genus = Schindleria | species = brevipinguis| month = September| year = 2017}}</ref> |- | | |''Hyaloglanis pulex'' |Trichomycteridae |{{convert|10|mm|abbr=on}} |{{convert|14.9|mm|abbr=on}}<ref name=Hpulex>{{cite journal | url = http://wfsc.tamu.edu/winemiller/lab/DePinna%26W-Ammoglanis-IEFW00.pdf | url-status = dead | archive-url = https://web.archive.org/web/20060913063915/http://wfsc.tamu.edu/winemiller/lab/DePinna%26W-Ammoglanis-IEFW00.pdf | archive-date = 13 September 2006 | journal=Ichthyol. Explor. Freshwaters|volume= 11 |issue=3|pages=255-264, 6 figs., 1 tab|date= November 2000 |issn= 0936-9902 | title=A new species of Ammoglanis (Siluriformes: Trichomycteridae) from Venezuela|author= Mario c. C. de Pinna |name-list-style= and |author2=Kirk O. Winemiller}}</ref> |}

==References== {{Reflist}}

{{DEFAULTSORT:Smallest fish}} Category:Lists of fishes Category:Lists by size F