# List of smallest fish

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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](/source/standard_length) at maturity the main contenders are ''[Paedocypris progenetica](/source/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](/source/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](/source/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](/source/dwarf_pygmy_goby) (''Pandaka pygmaea''), [midget dwarfgoby](/source/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](/source/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](/source/Standard_length) of smallest known mature individual
!Maximum known standard length
|-
|100px
|[Dwarf goby](/source/Paedocypris_progenetica)
|''[Paedocypris progenetica](/source/Paedocypris_progenetica)''
|[Cyprinidae](/source/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](/source/Danionella_translucida)''
|[Cyprinidae](/source/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](/source/Danionella_cerebrum)''
|[Cyprinidae](/source/Cyprinidae)
|10 mm<ref name=":0" />
|12.6 mm<ref name=":0" />
|-
|
|
|''[Leptophilypnion](/source/Leptophilypnion) fittkaui''
|[Eleotridae](/source/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](/source/Leptophilypnion) pusillus''
|[Eleotridae](/source/Eleotridae)
|?
|{{convert|9.1|mm|abbr=on}}<ref name=Roberts2013/>
|-
|100px
|[Dwarf pygmy goby](/source/Dwarf_pygmy_goby) 
|''[Pandaka pygmaea](/source/Pandaka_pygmaea)''
|[Gobiidae](/source/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](/source/Midget_dwarfgoby)
|''[Trimmatom nanus](/source/Trimmatom_nanus)''
|[Gobiidae](/source/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](/source/Photocorynus_spiniceps)''
|[Linophrynidae](/source/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](/source/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](/source/Schindleria_brevipinguis)''
|[Gobiidae](/source/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](/source/Hyaloglanis_pulex)''
|[Trichomycteridae](/source/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>
|}

==See also==
*[List of largest fish](/source/List_of_largest_fish)
*[Smallest organisms](/source/Smallest_organisms)

==References==
{{Reflist}}

{{diversity of fish|state=expanded}}

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

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Adapted from the Wikipedia article [List of smallest fish](https://en.wikipedia.org/wiki/List_of_smallest_fish) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/List_of_smallest_fish?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.