Killifishes & livebearers

549 species · 11 families

Killifishes and livebearers are small, often brightly coloured freshwater fish with a toothy mouth turned upward to feed at the surface. Many are livebearing — think of the guppy and swordtail — and hugely popular in the aquarium. Killifishes instead lay eggs that can survive a dry spell and hatch quickly when the rains return. They inhabit shallow pools, rice paddies and slow streams. Thanks to their colour, behaviour and ease of breeding they are classics among aquarium fish.

Open Fin's Fish Guide

Identify fish in seconds, log your catches and dives. Free open beta.

Get the app →

Aci Gölü toothcarp

Aphanius transgrediens

Cyprinodontidae

Adloff's pearlfish

Austrolebias adloffi

Rivulidae

African turquoise killifish

Nothobranchius furzeri

Nothobranchiidae

Agassiz's orestias

Orestias agassizii

Cyprinodontidae

Agila killifish

Laimosemion agilae

Rivulidae

Ahl's killi

Aphyosemion ahli

Nothobranchiidae

Alfaro

Alfaro cultratus

Poeciliidae

Alpha killi

Aphyosemion alpha

Nothobranchiidae

Amargosa pupfish

Cyprinodon nevadensis

Cyprinodontidae

Amazon molly

Poecilia formosa

Poeciliidae

American Flagfish

Jordanella floridae

Cyprinodontidae

Amiet's killifish

Fundulopanchax amieti

Nothobranchiidae

Amistad gambusia

Gambusia amistadensis

Poeciliidae

Anatolian killifish

Aphanius anatoliae

Cyprinodontidae

Anatolian killifish

Aphanius chantrei

Cyprinodontidae

Andean pupfish

Orestias frontosus

Cyprinodontidae

Ansorge's epiplatys

Epiplatys ansorgii

Nothobranchiidae

Antenor pearlfish

Hypsolebias antenori

Rivulidae

Aphyosemion georgiae

Aphyosemion georgiae

Nothobranchiidae

Aphyosemion lujae

Aphyosemion lujae

Nothobranchiidae

Aphyosemion primigenium

Aphyosemion primigenium

Nothobranchiidae

Aphyosemion wildekampi

Aphyosemion wildekampi

Nothobranchiidae

Arabian pupfish

Aphanius dispar

Cyprinodontidae

Argentine pearlfish

Austrolebias bellottii

Rivulidae

Arnold's killi

Fundulopanchax arnoldi

Nothobranchiidae

Azraq toothcarp

Aphanius sirhani

Cyprinodontidae

Bahama gambusia

Gambusia manni

Poeciliidae

Baja California killifish

Fundulus lima

Fundulidae

Balsas livebearer

Poeciliopsis balsas

Poeciliidae

Bamileke killifish

Aphyosemion bamilekorum

Nothobranchiidae

Banded epiplatys

Epiplatys fasciolatus

Nothobranchiidae

Banded killifish

Fundulus diaphanus

Fundulidae

Banded lampeye

Aplocheilichthys spilauchen

Poeciliidae

Banded limia

Limia vittata

Poeciliidae

Banded nothobranch

Nothobranchius fasciatus

Nothobranchiidae

Banded panchax

Epiplatys infrafasciatus

Nothobranchiidae

Banded panchax

Epiplatys annulatus

Nothobranchiidae

Banded panchax

Epiplatys mesogramma

Nothobranchiidae

Banded panchax

Epiplatys bifasciatus

Nothobranchiidae

Banded topminnow

Fundulus cingulatus

Fundulidae

Banner lyretail

Aphyosemion calliurum

Nothobranchiidae

Barbados millions

Poecilia reticulata

Poeciliidae

Barebrow pearlfish

Moema nudifrontata

Rivulidae

Barmoi panchax

Epiplatys barmoiensis

Nothobranchiidae

Barred livebearer

Carlhubbsia stuarti

Poeciliidae

Barred livebearer

Heterandria jonesii

Poeciliidae

Barred livebearer

Poeciliopsis turrubarensis

Poeciliidae

Barred splitfin

Chapalichthys encaustus

Goodeidae

Barred Topminnow

Quintana atrizona

Poeciliidae

Bates' killi

Aphyosemion batesii

Nothobranchiidae

Bayou killifish

Fundulus pulvereus

Fundulidae

Bayou topminnow

Fundulus nottii

Fundulidae

Beautiful pearlfish

Maratecoara formosa

Rivulidae

Beira killifish

Nothobranchius orthonotus

Nothobranchiidae

Beni rivulus

Anablepsoides beniensis

Rivulidae

Berthold's killifish

Scriptaphyosemion bertholdi

Nothobranchiidae

Big Bend gambusia

Gambusia gaigei

Poeciliidae

Big tailed lampeye

Lacustricola macrurus

Poeciliidae

Birkhahn's rivulus

Cynodonichthys birkhahni

Rivulidae

Bishop toothcarp

Brachyrhaphis episcopi

Poeciliidae

Bitschumbi lampeye

Lacustricola vitschumbaensis

Procatopodidae

Black-bellied limia

Limia melanogaster

Poeciliidae

Blackbanded limia

Limia melanonotata

Poeciliidae

Blackbarred limia

Limia nigrofasciata

Poeciliidae

Blackfin gambusia

Gambusia atrora

Poeciliidae

Blackfin goodea

Goodea atripinnis

Goodeidae

Blackfin killi

Nimbapanchax melanopterygius

Nothobranchiidae

Blackfin pupfish

Cyprinodon beltrani

Cyprinodontidae

Blackspotted nothobranch

Nothobranchius melanospilus

Nothobranchiidae

Blackspotted topminnow

Fundulus olivaceus

Fundulidae

Blackstripe livebearer

Poeciliopsis prolifica

Poeciliidae

Blackstripe topminnow

Fundulus notatus

Fundulidae

Blue eye

Aplocheilus panchax

Aplocheilidae

Blue gularis

Fundulopanchax sjostedti

Nothobranchiidae

Blue lampeye

Procatopus nototaenia

Poeciliidae

Blue lampeye

Hylopanchax stictopleuron

Poeciliidae

Blue lyretail

Fundulopanchax gardneri

Nothobranchiidae

Blue notho

Nothobranchius patrizii

Nothobranchiidae

Blue notobranch

Nothobranchius jubbi

Nothobranchiidae

Blue-eye

Poropanchax normani

Poeciliidae

Blueband killifish

Nothobranchius rachovii

Nothobranchiidae

Bluefin killi

Rachovia brevis

Rivulidae

Bluefin killifish

Lucania goodei

Fundulidae

Bluegreen lampeye

Procatopus aberrans

Poeciliidae

Boji nothobranch

Nothobranchius bojiensis

Nothobranchiidae

Bold goodeid

Characodon audax

Goodeidae

Bottle toothcarp

Tomeurus gracilis

Poeciliidae

Brasilia pearlfish

Simpsonichthys boitonei

Rivulidae

Brazilian killifish

Kryptolebias brasiliensis

Rivulidae

Broadspotted molly

Poecilia latipunctata

Poeciliidae

Brown rivulus

Rivulus cylindraceus

Rivulidae

Brownspotted killifish

Profundulus punctatus

Profundulidae

Brownstripe nothobranch

Nothobranchius fuscotaeniatus

Nothobranchiidae

Bruening's killi

Scriptaphyosemion brueningi

Nothobranchiidae

Bualanum killi

Aphyosemion bualanum

Nothobranchiidae

Bukoba lampeye

Lacustricola bukobanus

Poeciliidae

Bulldog goodeid

Alloophorus robustus

Goodeidae

Bumblebee goodeid

Allotoca dugesii

Goodeidae

Burdur toothcarp

Aphanius sureyanus

Cyprinodontidae

Butterfly splitfin

Ameca splendens

Goodeidae

Cabinda lampeye

Plataplochilus cabindae

Poeciliidae

Cali livebearer

Priapichthys caliensis

Poeciliidae

California killifish

Fundulus parvipinnis

Fundulidae

Cameroon killi

Aphyosemion cameronense

Nothobranchiidae

Cape Lopez lyretail

Aphyosemion australe

Nothobranchiidae

Carbonera pupfish

Cyprinodon fontinalis

Cyprinodontidae

Cardinal nothobranch

Nothobranchius cardinalis

Nothobranchiidae

Caribbean Gambusia

Gambusia puncticulata

Poeciliidae

Carletto's pearlfish

Hypsolebias carlettoi

Rivulidae

Carnegie's toothcarp

Cnesterodon carnegiei

Poeciliidae

Cascajal livebearer

Brachyrhaphis cascajalensis

Poeciliidae

Catemaco livebearer

Poeciliopsis catemaco

Poeciliidae

Catemaco molly

Poecilia catemaconis

Poeciliidae

Catemaco platyfish

Xiphophorus milleri

Poeciliidae

Cauca molly

Poecilia caucana

Poeciliidae

Caudal-stripe killi

Aphyosemion caudofasciatum

Nothobranchiidae

Caura rivulus

Anablepsoides caurae

Rivulidae

Celia's Aphysemion

Aphyosemion celiae

Nothobranchiidae

Cental east african lampeye

Lacustricola centralis

Poeciliidae

Ceylon killifish

Aplocheilus dayi

Aplocheilidae

Champoton swordtail

Carlhubbsia kidderi

Poeciliidae

Charco Palma pupfish

Cyprinodon veronicae

Cyprinodontidae

Chaytor's killi

Scriptaphyosemion chaytori

Nothobranchiidae

Checkered pupfish

Cualac tessellatus

Cyprinodontidae

Chestnut killifish

Aphyosemion castaneum

Nothobranchiidae

Chevalier's panchax

Epiplatys chevalieri

Nothobranchiidae

Chiapas swordtail

Xiphophorus alvarezi

Poeciliidae

Christy's killi

Aphyosemion christyi

Nothobranchiidae

Cinnamon killifish

Fundulopanchax cinnamomeus

Nothobranchiidae

Clear Creek gambusia

Gambusia heterochir

Poeciliidae

Clear livebearer

Poeciliopsis lucida

Poeciliidae

Coatzacoalcos swordtail

Xiphophorus clemenciae

Poeciliidae

Comanche Springs pupfish

Cyprinodon elegans

Cyprinodontidae

Congo killifish

Aphyosemion congicum

Nothobranchiidae

Creole Topminnow

Girardinus creolus

Poeciliidae

Crystal killi

Episemion krystallinoron

Nothobranchiidae

Cuatro Cienegas platyfish

Xiphophorus gordoni

Poeciliidae

Cuban gambusia

Gambusia pseudopunctata

Poeciliidae

Cuban Gambusia

Gambusia punctata

Poeciliidae

Cuban killifish

Fundulus saguanus

Fundulidae

Cuban Killifish

Cubanichthys cubensis

Cyprinodontidae

Cuban pupfish

Cyprinodon riverendi

Cyprinodontidae

Danford's toothcarp

Aphanius danfordii

Cyprinodontidae

Darge's killifish

Aphyosemion dargei

Nothobranchiidae

Darkedged splitfin

Girardinichthys multiradiatus

Goodeidae

Dearborn's pupfish

Cyprinodon dearborni

Cyprinodontidae

Delicate swordtail

Xiphophorus cortezi

Poeciliidae

Delta killi

Fundulopanchax deltaensis

Nothobranchiidae

Delta rivulus

Anablepsoides deltaphilus

Rivulidae

Derham's rivulus

Anablepsoides derhami

Rivulidae

Desert pupfish

Cyprinodon macularius

Cyprinodontidae

Devils Hole pupfish

Cyprinodon diabolis

Cyprinodontidae

Diamond killifish

Fundulus xenicus

Fundulidae

Dogtooth rivulus

Cynodonichthys tenuis

Rivulidae

Domingo gambusia

Gambusia dominicensis

Poeciliidae

Dorsalspot killifish

Campellolebias dorsimaculatus

Rivulidae

Dubois' Panchax

Epiplatys duboisi

Nothobranchiidae

Dusky millions fish

Phalloceros caudimaculatus

Poeciliidae

Dusky rivulus

Anablepsoides atratus

Rivulidae

Dwarf pearlfish

Notholebias minimus

Rivulidae

East coast lampeye

Pantanodon stuhlmanni

Poeciliidae

Eastern mosquitofish

Gambusia holbrooki

Poeciliidae

Ecucu killifish

Aphyosemion ecucuense

Nothobranchiidae

Edea killifish

Aphyosemion edeanum

Nothobranchiidae

Elegant Andean pupfish

Orestias elegans

Cyprinodontidae

Elegant killi

Aphyosemion elegans

Nothobranchiidae

Elegant rivulus

Cynodonichthys elegans

Rivulidae

Elongate livebearer

Poeciliopsis elongata

Poeciliidae

Elongate nothobranch

Nothobranchius elongatus

Nothobranchiidae

Elongate pearlfish

Austrolebias elongatus

Rivulidae

Epiplatys maeseni

Epiplatys maeseni

Nothobranchiidae

Erber's killi

Anablepsoides erberi

Rivulidae

Escherich's killi

Aphyosemion escherichi

Nothobranchiidae

Eseka panchax

Epiplatys esekanus

Nothobranchiidae

Etsam killifish

Aphyosemion etsamense

Nothobranchiidae

Etzel's killi

Epiplatys etzeli

Nothobranchiidae

Eye spot toothcarp

Poecilia vivipara

Poeciliidae

Eyespot lampeye

Lacustricola omoculatus

Poeciliidae

Featherfin panchax

Pterolebias longipinnis

Rivulidae

Ferrant's killi

Aphyosemion ferranti

Nothobranchiidae

Few-spotted toothcarp

Poeciliopsis paucimaculata

Poeciliidae

Fighting gaucho

Cynopoecilus melanotaenia

Rivulidae

Finefin killifish

Aphyosemion callipteron

Nothobranchiidae

Finescale foureyed fish

Anableps microlepis

Anablepidae

Fire pearlfish

Hypsolebias igneus

Rivulidae

Fire rivulus

Anablepsoides igneus

Rivulidae

Fire-mouth epiplatys

Epiplatys chaperi

Nothobranchiidae

Firehead panchax

Epiplatys phoeniceps

Nothobranchiidae

Flagged pearlfish

Hypsolebias flagellatus

Rivulidae

Flame pearlfish

Austrolebias luteoflammulatus

Rivulidae

Foersch's notho

Nothobranchius foerschi

Nothobranchiidae

Forget's Andean pupfish

Orestias forgeti

Cyprinodontidae

Foureye

Anableps anableps

Anablepidae

Fredrod's killifish

Scriptaphyosemion fredrodi

Nothobranchiidae

Fria toothcarp

Pseudopoecilia fria

Poeciliidae

Fromm's rivulus

Cynodonichthys frommi

Rivulidae

Fuelleborns's lampeye

Micropanchax fuelleborni

Poeciliidae

Fundulopanchax ndianus

Fundulopanchax ndianus

Nothobranchiidae

Fundulopanchax puerzli

Fundulopanchax puerzli

Nothobranchiidae

Gabon jewelfish

Aphyosemion cyanostictum

Nothobranchiidae

Gabon killifish

Aphyosemion gabunense

Nothobranchiidae

Geay's rivulus

Laimosemion geayi

Rivulidae

Geno tooth-carp

Aphanius ginaonis

Cyprinodontidae

Gérys killi

Scriptaphyosemion geryi

Nothobranchiidae

Ghisolfi's pearlfish

Hypsolebias ghisolfii

Rivulidae

Giant killifish

Fundulus grandissimus

Fundulidae

Giant rivulus

Anablepsoides hartii

Rivulidae

Giant sailfin molly

Poecilia velifera

Poeciliidae

Gila topminnow

Poeciliopsis occidentalis

Poeciliidae

Gill's molly

Poecilia gillii

Poeciliidae

Goldbelly Topminnow

Girardinus falcatus

Poeciliidae

Golden killifish

Aphyosemion aureum

Nothobranchiidae

Golden panchax

Pachypanchax playfairii

Aplocheilidae

Golden pheasant panchax

Callopanchax occidentalis

Nothobranchiidae

Golden rivulus

Anablepsoides holmiae

Rivulidae

Golden topminnow

Fundulus chrysotus

Fundulidae

Golden-tailed rivulus

Anablepsoides urophthalmus

Rivulidae

Goldline killi

Campellolebias chrysolineatus

Rivulidae

Goldspotted killifish

Floridichthys carpio

Cyprinodontidae

Graham's panchax

Epiplatys grahami

Nothobranchiidae

Green killi

Nimbapanchax viridis

Nothobranchiidae

Green panchax

Aplocheilus blockii

Aplocheilidae

Green swordtail

Xiphophorus hellerii

Poeciliidae

Green-banded rivulus

Laimosemion xiphidius

Rivulidae

Greenway's toothcarp

Scolichthys greenwayi

Poeciliidae

Grey pearlfish

Cynolebias griseus

Rivulidae

Grijalva studfish

Xenodexia ctenolepis

Poeciliidae

Guatemalan killifish

Profundulus guatemalensis

Profundulidae

Guignard's killifish

Scriptaphyosemion guignardi

Nothobranchiidae

Guinean killi

Archiaphyosemion guineense

Nothobranchiidae

Gulare

Fundulopanchax gularis

Nothobranchiidae

Gulf gambusia

Gambusia vittata

Poeciliidae

Gulf killifish

Fundulus grandis

Fundulidae

Harald's rivulus

Atlantirivulus haraldsiolii

Rivulidae

Hasson's nothobranch

Nothobranchius hassoni

Nothobranchiidae

Hazar toothcarp

Aphanius asquamatus

Cyprinodontidae

Headwater livebearer

Poeciliopsis monacha

Poeciliidae

Heinemann's killifish

Aphyosemion heinemanni

Nothobranchiidae

Hellner's pearlfish

Moema hellneri

Rivulidae

Hera killifish

Aphyosemion hera

Nothobranchiidae

Herzog's killi

Aphyosemion herzogi

Nothobranchiidae

Hessfeld's livebearer

Brachyrhaphis hessfeldi

Poeciliidae

Highland Andean pupfish

Orestias empyraeus

Cyprinodontidae

Highland swordtail

Xiphophorus multilineatus

Poeciliidae

Hiko White River springfish

Crenichthys baileyi

Goodeidae

Hispaniola molly

Poecilia hispaniolana

Poeciliidae

Hispaniola pupfish

Cyprinodon bondi

Cyprinodontidae

Hispaniolan gambusia

Gambusia hispaniolae

Poeciliidae

Holland's molly

Pamphorichthys hollandi

Poeciliidae

Hubbs' pupfish

Cyprinodon hubbsi

Cyprinodontidae

Huber's panchax

Epiplatys huberi

Nothobranchiidae

Hubers knife livebearer

Alfaro huberi

Poeciliidae

Huwald's killifish

Callopanchax huwaldi

Nothobranchiidae

Immaculate rivulus

Anablepsoides immaculatus

Rivulidae

Intermittent killi

Anablepsoides intermittens

Rivulidae

Intermittent killifish

Fundulopanchax intermittens

Nothobranchiidae

Iridescent rivulus

Anablepsoides iridescens

Rivulidae

Isfahan tooth-carp

Aphanius isfahanensis

Cyprinodontidae

Ispi

Orestias ispi

Cyprinodontidae

Isthmian killi

Cynodonichthys isthmensis

Rivulidae

Isthmian priapella

Priapella intermedia

Poeciliidae

Itapicuru pearlfish

Cynolebias itapicuruensis

Rivulidae

Jaegar's pearlfish

Austrolebias jaegari

Rivulidae

Jamaican gambusia

Gambusia melapleura

Poeciliidae

Jamaican killifish

Cubanichthys pengelleyi

Cyprinodontidae

January toothcarp

Phalloptychus januarius

Poeciliidae

Jean-Pol's killi

Nimbapanchax jeanpoli

Nothobranchiidae

Jewel killi

Aphyosemion exiguum

Nothobranchiidae

Joergenscheel's killifish

Aphyosemion joergenscheeli

Nothobranchiidae

Johnston's topminnow

Micropanchax johnstoni

Poeciliidae

Josiane's panchax

Epiplatys josianae

Nothobranchiidae

Jussieu's pupfish

Orestias jussiei

Cyprinodontidae

Kadlec's nothobranch

Nothobranchius kadleci

Nothobranchiidae

Kafue killifish

Nothobranchius kafuensis

Nothobranchiidae

Katanga lampeye

Lacustricola katangae

Poeciliidae

Kikambala nothobranch

Nothobranchius interruptus

Nothobranchiidae

Killi

Epiplatys longiventralis

Nothobranchiidae

Killifish

Fundulus majalis

Fundulidae

Killifish

Fundulus heteroclitus

Fundulidae

Killifish

Fundulus confluentus

Fundulidae

Kirchmayer's panchax

Aplocheilus kirchmayeri

Aplocheilidae

Kirovsky's killi

Laimosemion kirovskyi

Rivulidae

Kongoro lampeye

Lacustricola kongoranensis

Poeciliidae

Korthaus's killifish

Nothobranchius korthausae

Nothobranchiidae

Kouame killifish

Aphyosemion kouamense

Nothobranchiidae

Krammer's nothobranch

Nothobranchius krammeri

Nothobranchiidae

Kribi killi

Fundulopanchax fallax

Nothobranchiidae

La Palma pupfish

Cyprinodon longidorsalis

Cyprinodontidae

Labarre's killifish

Aphyosemion labarrei

Nothobranchiidae

Lacorte's pearlfish

Maratecoara lacortei

Rivulidae

Lake killifish

Fundulopanchax lacustris

Nothobranchiidae

Lake lampeye

Lacustricola lacustris

Poeciliidae

Lake Titicaca orestias

Orestias pentlandii

Cyprinodontidae

Lambert's killi

Aphyosemion lamberti

Nothobranchiidae

Largelip killifish

Profundulus labialis

Profundulidae

Least killifish

Heterandria formosa

Poeciliidae

Lefini killifish

Aphyosemion lefiniense

Nothobranchiidae

Lemonfin killifish

Leptolebias citrinipinnis

Rivulidae

Lemonfin killifish

Aphyosemion citrineipinnis

Nothobranchiidae

Leon Springs pupfish

Cyprinodon bovinus

Cyprinodontidae

Lerma livebearer

Poeciliopsis infans

Poeciliidae

Lerma livebearer

Poeciliopsis viriosa

Poeciliidae

Liberian killi

Scriptaphyosemion liberiense

Nothobranchiidae

Liberty molly

Poecilia salvatoris

Poeciliidae

Lined topminnow

Fundulus lineolatus

Fundulidae

Live-bearing tooth-carp

Gambusia affinis

Poeciliidae

Llanos killifish

Austrofundulus transilis

Rivulidae

Llanos killifish

Llanolebias stellifer

Rivulidae

Loeme lampeye

Plataplochilus loemensis

Poeciliidae

Loennberg's killi

Aphyosemion loennbergii

Nothobranchiidae

Longnose killifish

Fundulus similis

Fundulidae

Louesse killi

Aphyosemion louessense

Nothobranchiidae

Lourens's nothobranch

Nothobranchius lourensi

Nothobranchiidae

Lovely killifish

Aphyosemion amoenum

Nothobranchiidae

Lowland livebearer

Poeciliopsis latidens

Poeciliidae

Lualaba lampeye

Lacustricola lualabaensis

Poeciliidae

Lueke's nothobranch

Nothobranchius luekei

Nothobranchiidae

Lueling's rivulus

Atlantirivulus luelingi

Rivulidae

Lung's rivulus

Anablepsoides lungi

Rivulidae

Lyretail rivulus

Laimosemion lyricauda

Rivulidae

Magdalena rivulus

Cynodonichthys magdalenae

Rivulidae

Malabar killie

Aplocheilus lineatus

Aplocheilidae

Malinche swordtail

Xiphophorus malinche

Poeciliidae

Mangrove gambusia

Gambusia rhizophorae

Poeciliidae

Mangrove molly

Poecilia orri

Poeciliidae

Mangrove rivulus

Kryptolebias marmoratus

Rivulidae

Many-banded panchax

Epiplatys multifasciatus

Nothobranchiidae

Marbled swordtail

Xiphophorus meyeri

Poeciliidae

Meander lampeye

Micropanchax hutereaui

Poeciliidae

Mediterranean banded killifish

Aphanius fasciatus

Cyprinodontidae

Merry widow

Phallichthys amates

Poeciliidae

Mesopotamian tooth-carp

Aphanius sophiae

Cyprinodontidae

Metallic livebearer

Girardinus metallicus

Poeciliidae

Mexican swordtail

Xiphophorus montezumae

Poeciliidae

Mirabilis lyretail

Fundulopanchax mirabilis

Nothobranchiidae

Miragoane gambusia

Gambusia beebei

Poeciliidae

Moen killifish

Fundulopanchax moensis

Nothobranchiidae

Moero lampeye

Lacustricola moeruensis

Poeciliidae

Monrovia killifish

Callopanchax monroviae

Nothobranchiidae

Monterrey Platyfish

Xiphophorus couchianus

Poeciliidae

Moon

Xiphophorus maculatus

Poeciliidae

Mosquito fish

Gambusia nicaraguensis

Poeciliidae

Mount Cameroon killifish

Aphyosemion poliaki

Nothobranchiidae

Mountain swordatail

Xiphophorus nezahualcoyotl

Poeciliidae

Mournful killi

Aphyosemion lugens

Nothobranchiidae

Mt. Nimba lampeye

Rhexipanchax nimbaensis

Poeciliidae

Natal lampeye

Lacustricola myaposae

Poeciliidae

Neumann's panchax

Epiplatys neumanni

Nothobranchiidae

Nga lampeye

Plataplochilus ngaensis

Poeciliidae

Nile killifish

Micropanchax loati

Procatopodidae

Nile lampeye

Micropanchax antinorii

Poeciliidae

Nion pearlfish

Austrolebias nioni

Rivulidae

Njala panchax

Epiplatys njalaensis

Nothobranchiidae

Northern plains killifish

Fundulus kansae

Fundulidae

Northern starhead topminnow

Fundulus dispar

Fundulidae

Northern studfish

Fundulus catenatus

Fundulidae

Nothobranch killifish

Nothobranchius janpapi

Nothobranchiidae

Nothobranch killifish

Nothobranchius neumanni

Nothobranchiidae

Nothobranchius eggersi

Nothobranchius eggersi

Nothobranchiidae

Nuba nothobranch

Nothobranchius nubaensis

Nothobranchiidae

Oaxaca killifish

Profundulus oaxacae

Profundulidae

Oblique livebearer

Pseudoxiphophorus obliquus

Poeciliidae

Ocellated killi

Aphyosemion ocellatum

Nothobranchiidae

Ocellated mangrove killifish

Kryptolebias ocellatus

Rivulidae

Ocellated pupfish

Floridichthys polyommus

Cyprinodontidae

Oeser's killifish

Fundulopanchax oeseri

Nothobranchiidae

Ogowe killi

Aphyosemion ogoense

Nothobranchiidae

Olbrechts' panchax

Epiplatys olbrechtsi

Nothobranchiidae

Onesided livebearer

Jenynsia lineata

Anablepidae

Onesided livebearer

Jenynsia multidentata

Anablepidae

Opal killifish

Leptolebias opalescens

Rivulidae

Orange finned toothcarp

Priapichthys annectens

Poeciliidae

Orange flagfish

Garmanella pulchra

Cyprinodontidae

Orestias crawfordi

Orestias crawfordi

Cyprinodontidae

Orestias mulleri

Orestias mulleri

Cyprinodontidae

Orient toothcarp

Aphanius mento

Cyprinodontidae

Owens Pupfish

Cyprinodon radiosus

Cyprinodontidae

Pacific foureyed fish

Anableps dowei

Anablepidae

Pacific molly

Poecilia butleri

Poeciliidae

Pahrump poolfish

Empetrichthys latos

Goodeidae

Painted livebearer

Micropoecilia picta

Poeciliidae

Painted pearlfish

Hypsolebias picturatus

Rivulidae

Pangani nothobranch

Nothobranchius palmqvisti

Nothobranchiidae

Panuco gambusia

Gambusia panuco

Poeciliidae

Panuco swordtail

Xiphophorus nigrensis

Poeciliidae

Papillate pearlfish

Nematolebias papilliferus

Rivulidae

Para molly

Poecilia parae

Poeciliidae

Paschen's killifish

Aphyosemion pascheni

Nothobranchiidae

Passaro's killifish

Aphyosemion passaroi

Nothobranchiidae

Patricia's pearlfish

Austrolebias patriciae

Rivulidae

Pecos gambusia

Gambusia nobilis

Poeciliidae

Perugia's limia

Limia perugiae

Poeciliidae

Peters' killi

Nimbapanchax petersi

Nothobranchiidae

Pfaff's lampeye

Micropanchax pfaffi

Procatopodidae

Picotee livebearer

Phallichthys fairweatheri

Poeciliidae

Pike killifish

Belonesox belizanus

Poeciliidae

Pinima rivulus

Melanorivulus pinima

Rivulidae

Plains killifish

Fundulus zebrinus

Fundulidae

Plains topminnow

Fundulus sciadicus

Fundulidae

Plumed lyretail

Fundulopanchax filamentosus

Nothobranchiidae

Poranga pearlfish

Pituna poranga

Rivulidae

Porthole livebearer

Poeciliopsis gracilis

Poeciliidae

Potosi pupfish

Cyprinodon alvarezi

Cyprinodontidae

Powder-blue panchax

Pachypanchax omalonotus

Aplocheilidae

Powell's killifish

Fundulopanchax powelli

Nothobranchiidae

Pronothobranchius kiyawensis

Pronothobranchius kiyawensis

Nothobranchiidae

Pygmy killifish

Leptolucania ommata

Fundulidae

Pygmy swordtail

Xiphophorus pygmaeus

Poeciliidae

Quii's pearlfish

Moema quiii

Rivulidae

Quitobaquito pupfish

Cyprinodon eremus

Cyprinodontidae

Radda's killi

Aphyosemion raddai

Nothobranchiidae

Railroad Valley springfish

Crenichthys nevadae

Goodeidae

Rainwater killifish

Lucania parva

Fundulidae

Rancurel's lampeye

Poropanchax rancureli

Procatopodidae

Rectogo killifish

Aphyosemion rectogoense

Nothobranchiidae

Red lyretail

Aphyosemion bivittatum

Nothobranchiidae

Red River pupfish

Cyprinodon rubrofluviatilis

Cyprinodontidae

Red striped lampeye

Plataplochilus miltotaenia

Poeciliidae

Red Victoria nothobranch

Nothobranchius robustus

Nothobranchiidae

Red-striped killifish

Aphyosemion striatum

Nothobranchiidae

Redchin panchax

Epiplatys dageti

Nothobranchiidae

Redfin notho

Nothobranchius kirki

Nothobranchiidae

Redlined killi

Anablepsoides rubrolineatus

Rivulidae

Redlip killifish

Fundulopanchax rubrolabialis

Nothobranchiidae

Redspot panchax

Aphyosemion cognatum

Nothobranchiidae

Redspotted panchax

Epiplatys lamottei

Nothobranchiidae

Redtail notho

Nothobranchius guentheri

Nothobranchiidae

Riggenbach's killifish

Aphyosemion riggenbachi

Nothobranchiidae

Rio pearlfish

Nematolebias whitei

Rivulidae

Robertson's killifish

Fundulopanchax robertsoni

Nothobranchiidae

Roloff's killi

Scriptaphyosemion roloffi

Nothobranchiidae

Roloff's killifish

Epiplatys roloffi

Nothobranchiidae

Roloff's rivulus

Rivulus roloffi

Rivulidae

Romer's rivulus

Laimosemion romeri

Rivulidae

Rosenstock's nothobranch

Nothobranchius rosenstocki

Nothobranchiidae

Ruhkopf's panchax

Epiplatys ruhkopfi

Nothobranchiidae

Ruwenzori lampeye

Platypanchax modestus

Poeciliidae

Sailfin molly

Poecilia latipinna

Poeciliidae

Salt Creek pupfish

Cyprinodon salinus

Cyprinodontidae

Saltmarsh topminnow

Fundulus jenkinsi

Fundulidae

San Jeronimo livebearer

Poeciliopsis fasciata

Poeciliidae

Sangmelima panchax

Epiplatys sangmelinensis

Nothobranchiidae

Santos killi

Atlantirivulus santensis

Rivulidae

Savanna killi

Epiplatys spilargyreius

Nothobranchiidae

Schioetz's killifish

Aphyosemion schioetzi

Nothobranchiidae

Schioetz's lampeye

Rhexipanchax schioetzi

Poeciliidae

Schleser's killifish

Aphyolebias schleseri

Rivulidae

Schlupp's killi

Aphyosemion schluppi

Nothobranchiidae

Schmitt's killi

Scriptaphyosemion schmitti

Nothobranchiidae

Seminole killifish

Fundulus seminolis

Fundulidae

Sepia killifish

Kryptolebias sepia

Rivulidae

Shadow toothcarp

Xenophallus umbratilis

Poeciliidae

Sheepshead minnow

Cyprinodon variegatus

Cyprinodontidae

Sheepshead swordtail

Xiphophorus birchmanni

Poeciliidae

Short-finned molly

Poecilia sphenops

Poeciliidae

Shortfin molly

Poecilia mexicana

Poeciliidae

Shorthead rivulus

Laimosemion breviceps

Rivulidae

Showy rivulus

Anablepsoides speciosus

Rivulidae

Singa panchax

Epiplatys singa

Nothobranchiidae

Singlespot Topminnow

Girardinus uninotatus

Poeciliidae

Sixbar panchax

Epiplatys sexfasciatus

Nothobranchiidae

Sky-blue killi

Aphyosemion coeleste

Nothobranchiidae

Sleek mosquitofish

Gambusia luma

Poeciliidae

Slender mirror livebearer

Priapella compressa

Poeciliidae

Slenderhead pearlfish

Cynolebias leptocephalus

Rivulidae

Small scaled nothobranch

Nothobranchius microlepis

Nothobranchiidae

Smallfin rivulus

Anablepsoides micropus

Rivulidae

Smallfinger Topminnow

Girardinus microdactylus

Poeciliidae

Soconusco gambusia

Brachyrhaphis hartwegi

Poeciliidae

Southern deepbody

Hypsopanchax jubbi

Poeciliidae

Southern studfish

Fundulus stellifer

Fundulidae

Spanish toothcarp

Aphanius iberus

Cyprinodontidae

Speckled killifish

Fundulus rathbuni

Fundulidae

Splendid killi

Aphyosemion splendopleure

Nothobranchiidae

Splendid killifish

Aphanius splendens

Cyprinodontidae

Spotfin killi

Rachovia maculipinnis

Rivulidae

Spotfin killifish

Fundulus luciae

Fundulidae

Spotted killi

Aphyosemion punctatum

Nothobranchiidae

Spotted killifish

Nothobranchius kuhntae

Nothobranchiidae

Spotted killifish

Aphyosemion maculatum

Nothobranchiidae

Spotted onesided livebearer

Jenynsia maculata

Anablepidae

Spotted pearlfish

Hypsolebias notatus

Rivulidae

Staeck's pearlfish

Moema staecki

Rivulidae

Starhead killi

Fenerbahce formosus

Nothobranchiidae

Steinfort's notho

Nothobranchius steinforti

Nothobranchiidae

Stippled studfish

Fundulus bifax

Fundulidae

Straighttail rivulus

Laimosemion rectocaudatus

Rivulidae

Striped nothobranch

Nothobranchius taeniopygus

Nothobranchiidae

Striped nothobranch

Nothobranchius virgatus

Nothobranchiidae

Stripped gambusia

Gambusia sexradiata

Poeciliidae

Sulphur molly

Poecilia sulphuraria

Poeciliidae

Sunset platy

Xiphophorus variatus

Poeciliidae

Swamp killi

Anablepsoides stagnatus

Rivulidae

Sword pearlfish

Micromoema xiphophora

Rivulidae

Swordtail platyfish

Xiphophorus xiphidium

Poeciliidae

Tanganyika lampeye

Lacustricola pumilus

Poeciliidae

Tanganyika lampeye

Lamprichthys tanganicanus

Poeciliidae

Tecmina killi

Laimosemion tecminae

Rivulidae

Tellia toothcarp

Aphanius apodus

Cyprinodontidae

Ten spotted live-bearer

Cnesterodon decemmaculatus

Poeciliidae

Terraba toothcarp

Brachyrhaphis terrabensis

Poeciliidae

Terver's lampeye

Plataplochilus terveri

Poeciliidae

Tex-Mex gambusia

Gambusia speciosa

Poeciliidae

Thys's killi

Aphyosemion thysi

Nothobranchiidae

Tiburon limia

Limia heterandria

Poeciliidae

Tiburon Peninsula limia

Limia dominicensis

Poeciliidae

Tiger teddy

Neoheterandria tridentiger

Poeciliidae

Tirbak's killifish

Aphyosemion tirbaki

Nothobranchiidae

Todd's killi

Callopanchax toddi

Nothobranchiidae

Togo Killifish

Nothobranchius thierryi

Nothobranchiidae

Togo panchax

Epiplatys togolensis

Nothobranchiidae

Toothy Topminnow

Girardinus denticulatus

Poeciliidae

Torrent rivulus

Laimosemion torrenticola

Rivulidae

Tschudi's Andean pupfish

Orestias tschudii

Cyprinodontidae

Turner's livebearer

Poeciliopsis turneri

Poeciliidae

Twin notho

Nothobranchius geminus

Nothobranchiidae

Two-striped Aphyosemion

Aphyosemion bitaeniatum

Nothobranchiidae

Twospot livebearer

Heterandria bimaculata

Poeciliidae

Uatuma killi

Laimosemion uatuman

Rivulidae

Uganda nothobranch

Nothobranchius ugandensis

Nothobranchiidae

Valencia toothcarp

Valencia hispanica

Valenciidae

Vandenberg's pearlfish

Austrolebias vandenbergi

Rivulidae

Vandepoll's molly

Poecilia vandepolli

Poeciliidae

Variable lampeye

Procatopus similis

Poeciliidae

Venezuela killifish

Austrofundulus limnaeus

Rivulidae

Villwock's tooth-carp

Aphanius villwocki

Cyprinodontidae

Volcano killi

Aphyosemion volcanum

Nothobranchiidae

Waccamaw killifish

Fundulus waccamensis

Fundulidae

Wachters' killifish

Aphyosemion wachtersi

Nothobranchiidae

Waimacu killi

Anablepsoides waimacui

Rivulidae

Walker's killi

Fundulopanchax walkeri

Nothobranchiidae

Werner's killifish

Aphyosemion franzwerneri

Nothobranchiidae

Western starhead topminnow

Fundulus blairae

Fundulidae

White Andean pupfish

Orestias albus

Cyprinodontidae

White-eye

Oxyzygonectes dovii

Anablepidae

Whitefin killi

Nimbapanchax leucopterygius

Nothobranchiidae

Whiteline topminnow

Fundulus albolineatus

Fundulidae

Whitemargin nothobranch

Nothobranchius albimarginatus

Nothobranchiidae

Wolterstorff's pearlfish

Austrolebias wolterstorffi

Rivulidae

Wray's gambusia

Gambusia wrayi

Poeciliidae

Yellow orestias

Orestias luteus

Cyprinodontidae

Yellowfin killi

Foerschichthys flavipinnis

Nothobranchiidae

Yellowtail pearlfish

Hypsolebias flavicaudatus

Rivulidae

Yucatan gambusia

Gambusia yucatana

Poeciliidae

Yucatan pupfish

Cyprinodon artifrons

Cyprinodontidae

Zagros tooth-carp

Aphanius vladykovi

Cyprinodontidae

Zaire lampeye

Hypsopanchax platysternus

Poeciliidae

Zebra lampeye

Hypsopanchax zebra

Poeciliidae

Zygaima killifish

Aphyosemion zygaima

Nothobranchiidae