Kaalpens gobyCoryogalops william
Kabeyawan sand eelBascanichthys kabeyawan
Kabili bumblebee gobyBrachygobius kabiliensis
Kachira BlueHaplochromis commutabilis
Kafue killifishNothobranchius kafuensis
Kaguya's dartfishNavigobius kaguya
Kai Island deepwater dragonetBathycallionymus kaianus
Kai stargazerUranoscopus kaianus
Kai stingareeUrolophus kaianus
Kailash Chandra's snake eelOphichthus kailashchandrai
Kailola's deepwater dragonetCallionymus kailolae
Kailola's hardyheadCraterocephalus kailolae
Kais kingfishCyprinion kais
Kaja's sixgill sawsharkPliotrema kajae
Kakuk's coralbrotulaOgilbichthys kakuki
Kalambo suckermouthChiloglanis kalambo
Kalbar rasboraRasbora kalbarensis
Kaleidos wrassePseudojuloides kaleidos
Kalfatak's stiphodonStiphodon kalfatak
Kalimantan ilishaIlisha macrogaster
Kalimantan river spratClupeoides hypselosoma
Kalsubai loachIndoreonectes kalsubai
KalugaSinosturio dauricus
Kamaka rainbowfishMelanotaenia kamaka
Kamchatka flounderAtheresthes evermanni
Kami barbPuntius kamalika
Kami's perchletPlectranthias kamii
Kammal thryssaThryssa kammalensis
Kamohara grenadierCoelorinchus kamoharai
Kamohara's armored searobinParaheminodus kamoharai
Kamohara's BandfishOwstonia kamoharai
Kampen's ilishaIlisha kampeni
KampoyoBagrus meridionalis
Kanadi kingfishScomberomorus plurilineatus
GameKanakorum catsharkAulohalaelurus kanakorum
Kanawha darterEtheostoma kanawhae
Kanawha minnowPhenacobius teretulus
Kane's coryCorydoras kanei
Kanglang fishAnabarilius grahami
Kanmu dragonetSynchiropus kanmuensis
Kantaka barbKantaka brevidorsalis
Kapala lanternfishDiaphus kapalae
Kapala stingareeUrolophus kapalensis
Kapala whiptailNezumia kapala
Kappa reefgobyPriolepis kappa
Kappie blennyOmobranchus woodi
Kapuas elegant paradise fishPolynemus kapuasensis
Kapuas river spratClupeichthys bleekeri
Kara tadpolefishCareproctus karaensis
Karanteen seabreamCrenidens crenidens
Karen's sandperchParapercis altipinnis
Kariba tilapiaOreochromis mortimeri
GameKarimunjawa dottybackPseudochromis ransonneti
Karin's coralbrotulaDiancistrus karinae
Karnella's roverEmmelichthys karnellai
Karonga tilapiaOreochromis karongae
Karrer's whiptailCoelorinchus karrerae
Karstsinnectes acridorsalis
Karstsinnectes anophthalmus
Karun barbelBarbus karunensis
Karut croakerJohnius carutta
KasawalaOreochromis squamipinnis
Kasenye lampeyeLacustricola kassenjiensis
Kashgarian loachHedinichthys yarkandensis
Katavi mouthbrooderHaplochromis katavi
Kathala croakerKathala axillaris
Katherine's wrasseCirrhilabrus katherinae
Kathetostoma binigrasella
KatranaRheocles alaotrensis
Katrine's coralbrotulaDiancistrus katrineae
Kaup's arrowtooth eelSynaphobranchus kaupii
Kaup's soleSynaptura albomaculata
Kavirondo barbEnteromius sexradiatus
Kawai's deepsea batfishHalieutopsis kawaii
KawakawaEuthynnus affinis
GameKawari-inki-uoParaliparis anomalus
Kbalan’s snake eelOphichthus kbalanensis
Keel-belly tadpolefishCareproctus carinatus
Keelcheek bassParascombrops spinosus
Keeled needlefishPlatybelone platyura
GameKeeley's dragonetCallionymus keeleyi
Keeling deepwater cardinalfishEpigonus tuberculatus
Keeljaw needlefishTylosurus melanotus
Keeltail needlefishPlatybelone argalus
Kei gobyOxyurichthys keiensis
Keletaona's GobyStenogobius keletaona
Keliao lefteye flounderEngyprosopon keliaoense
Kellogg's scorpionfishScorpaenodes kelloggi
Kelp bassParalabrax clathratus
GameKelp clingfishRimicola muscarum
Kelp greenlingHexagrammos decagrammus
GameKelp gunnelUlvicola sanctaerosae
Kelp klipfishClinus rotundifrons
Kelp perchBrachyistius frenatus
Kelp pipefishSyngnathus californiensis
Kelp poacherAgonomalus mozinoi
Kelp rockfishSebastes atrovirens
Kelp sculpinSigmistes caulias
Kelp snailfishLiparis tunicatus
Kelp weedfishHeteroclinus eckloniae
KelpfishChironemus marmoratus
Kenting sandperchParapercis kentingensis
Kentrocapros flavofasciatus
Kentucky darterEtheostoma rafinesquei
Kenyan chromisChromis nigroanalis
KeppiSarotherodon lohbergeri
Kerala beautyHypselobarbus nitidus
Kerala hagfishEptatretus sunilii
Kerala mystusMystus armatus
Kerguelen sandpaper skateBathyraja irrasa
Kerguelen spiny plunderfishHarpagifer kerguelensis
Kermadec clingfishFlexor incus
Kermadec dwarfgobyEviota kermadecensis
Kermadec rattailCoelorinchus kermadecus
Kermadec scalyfinParma kermadecensis
Kermadec spiny dogfishSqualus raoulensis
Kermadec triplefinEnneapterygius kermadecensis
Kern brook lampreyOccidentis hubbsi
Kerryclarkella inconspicua
GameKersin barbellLuciobarbus kersin
Kertomichthys blastorhinos
Kessler's gudgeonRomanogobio kesslerii
Kessler's loachParaschistura kessleri
Kessler's sculpinLeocottus kesslerii
Kestrel gobyGobius xoriguer
Key anchovyAnchoa cayorum
Key blennyStarksia starcki
Key brotulaOgilbia cayorum
Key silversideMenidia conchorum
Key worm eelAhlia egmontis
Keyhole angelfishCentropyge tibicen
Keyhole cichlidCleithracara maronii
Khadary-whitefishCoregonus chadary
Khaki flounderLaeops natalensis
Khandalla minnowParapsilorhynchus tentaculatus
Khanka gudgeonSqualidus chankaensis
Khanka spiny bitterlingAcanthorhodeus chankaensis
Khavalchor catfishPachypterus khavalchor
Khavli barbPuntius sahyadriensis
Kiamichi shinerMiniellus ortenburgeri
Kibiti LampeyeLacustricola lacustris
KibondeChrysichthys brachynema
Kichulchoia brevifasciata
Kidako morayGymnothorax kidako
GameKido's snailfishCareproctus kidoi
Kiener's silversideTeramulus kieneri
Kijimuna gobyLentipes kijimuna
Kikambala nothobranchNothobranchius interruptus
Kikori River SoleLeptachirus kikori
Killarney shadAlosa killarnensis
Kimberley archerfishToxotes kimberleyensis
Kimberley blennyCirripectes alleni
Kimberley catfishParaplotosus muelleri
Kimberley grunterSyncomistes kimberleyensis
Kimberley mogurndaMogurnda oligolepis
Kimberley spangled perchLeiopotherapon macrolepis
Kindia killiScriptaphyosemion cauveti
King angelfishHolacanthus passer
King demoiselleChrysiptera rex
King garScomberesox scombroides
King George whitingSillaginodes punctatus
GameKing gobyGladiogobius rex
King mackerelScomberomorus cavalla
GameKing of herringsRegalecus glesne
GameKing scorpionfishScorpaenopsis gigas
King snake eelOphichthus rex
GameKing soldierbreamArgyrops spinifer
King threadfinPolydactylus macrochir
GameKing tiger plecoHypancistrus seideli
King weakfishMacrodon ancylodon
King Yalu high-plateau loachTriplophysa yaluwang
King-of-the-salmonTrachipterus altivelis
KingklipGenypterus capensis
Kinmei dragonetSynchiropus kinmeiensis
Kinneret bleakMirogrex terraesanctae
Kirk's blennyAlticus kirkii
Kissing gouramiHelostoma temminckii
GameKissing loachParabotia curtus
Kissing prochilodusSemaprochilodus insignis
Kitefin sharkDalatias licha
Kithulgala danioDevario micronema
Kiungululu tilapiaOreochromis chungruruensis
Kiwi hatchetfishPolyipnus kiwiensis
Kiyo's dragonetSynchiropus kiyoae
Kizilirmak sportive loachOxynoemacheilus samanticus
Kızılırmak killifishAnatolichthys marassantensis
Klamath Lake sculpinCottus princeps
Klamath largescale suckerCatostomus snyderi
Klamath river lampreyEntosphenus similis
Klapanunggal blind cave barbBarbodes klapanunggalensis
Klausewitz' garden eelGorgasia klausewitzi
Klein's soleSynapturichthys kleinii
Klunzinger's mulletPlaniliza klunzingeri
Klunzinger's ponyfishEquulites klunzingeri
Klunzinger's wrasseThalassoma rueppellii
Knaacks coryCorydoras knaacki
Kner's gobyPomatoschistus knerii
Kner's stareaterAstronesthes barbata
Kner's wrasseHalichoeres kneri
Knife livebearerAlfaro cultratus
Knife razorfishCymolutes praetextatus
Knife-back seabreamPolyamblyodon gibbosum
Knife-snouted pipefishHypselognathus rostratus
KnifejawOplegnathus woodwardi
Knifetooth dogfishScymnodon ringens
Knipowitsch's tadpoleCareproctus knipowitschi
Knipowitschia montenegrina
Knobbed porgyCalamus nodosus
GameKnobchin gobyGobiosoma nudum
Knobfin sculpinCottus immaculatus
Knobsnout parrotfishScarus ovifrons
Knothead parrotfishChlorurus oedema
Knout gobyMesogobius batrachocephalus
Knysna sandgobyPsammogobius knysnaensis
Knysna seahorseHippocampus capensis
KoaroGalaxias brevipinnis
Kobayashi's bristlemouthCyclothone kobayashii
Kobayashi's triangular batfishMalthopsis kobayashii
Kobe flounderCrossorhombus kobensis
Kochichthys flavofasciatus
Koefoed's searsidSearsia koefoedi
Koefoed's smooth-headBathytroctes macrolepis
KoesterAcanthistius sebastoides
GameKokoda glass perchletTetracentrum caudovittatus
Kokoda mogurndaMogurnda lineata
Kokraimoro tube-snouted ghost knifefishSternarchorhynchus kokraimoro
KokuniChrysichthys cranchii
Kola rainbowfishMelanotaenia kolaensis
Kolombatovic's gobyChromogobius zebratus
Kolombatovic's gobyGobius kolombatovici
Kolpotocheirodon figueiredoi
Kolpotocheirodon theloura
Komodo cardinalfishOstorhinchus komodoensis
Komodo damselfishPomacentrus komodoensis
Komodo fangblennyMeiacanthus abruptus
Komodo viviparous brotulaUngusurculus komodoensis
Komodo whiptailPentapodus komodoensis
Kongoro lampeyeLacustricola kongoranensis
Koningsberger's herringHerklotsichthys koningsbergeri
Konti barbOsteochilichthys thomassi
Kor scraperCapoeta macrolepis
Koragu tank gobyGlossogobius koragensis
Korean bitteringTanakia signifer
Korean bonefishAlbula koreana
Korean darter dragonetCallionymus leucopoecilus
Korean dragonetCallionymus koreanus
Korean lampreyEudontomyzon morii
Korean pricklebackDictyosoma tongyeongensis
Korean rockfishSebastes schlegelii
GameKorean sandburrowerLimnichthys koreanus
Korean sandlanceHypoptychus dybowskii
Korean seahorseHippocampus haema
Korean seerfishScomberomorus koreanus
GameKorean skateHongeo koreanus
Korean Snake eelOphichthus sangjuensis
Korean stumpy bullheadCoreobagrus brevicorpus
Korechika's dwarfobyEviota korechika
Koreocobitis naktongensis
Korhi barbHypselobarbus micropogon
GameKorogwe tilapiaOreochromis korogwe
Kosciuszko GalaxiasGalaxias supremus
Koshi NangraNangra assamensis
Kosi rockskipperPereulixia kosiensis
Kosogol graylingThymallus nigrescens
Kosswig's barbCarasobarbus kosswigi
Kosswig's loachTurcinoemacheilus kosswigi
Kotaka's argentineGlossanodon kotakamaru
Kotlyar's cubeheadCubiceps kotlyari
Kotlyar's whiptailMataeocephalus kotlyari
Kottelat rasboraRasbora hobelmani
Kottelatlimia hipporhynchos
Kotthaus' deepwater dragonetCallionymus kotthausi
Kranji drombusDrombus globiceps
Krasyukova's perchCaprodon krasyukovae
Krauss' blennyEnchelyurus kraussii
Krefft's dreamerOneirodes kreffti
Krefft's frillgobyBathygobius krefftii
Krefft's rayMalacoraja kreffti
Krefft's smooth-headHerwigia kreffti
Krefft's snaggletoothAstronesthes kreffti
Kreiser's KillifishProfundulus kreiseri
Krempf's flounderGrammatobothus krempfi
Kribi killiFundulopanchax fallax
Kriete's tonguefishSymphurus billykrietei
Krishna carpHypselobarbus dobsoni
Kroyer's deep-sea angler fishCeratias holboelli
Krynicki's loachOxynoemacheilus merga
Kryptolebias brasiliensis
Kryptolebias caudomarginatus
Kryptolebias hermaphroditus
Kryptopterus cryptopterus
Kryptopterus palembangensis
Kryptopterus paraschilbeides
Kuban barbelBarbus kubanicus
Kuban long-barbelled gudgeonRomanogobio pentatrichus
Kuban's naseChondrostoma kubanicum
Kubuna hardyheadCraterocephalus randi
Küçük Menderes spined loachCobitis fahireae
Kudersky parketnikMuraenolepis kuderskii
Kudo's pygmygobyTrimma kudoi
Kuiter's damselfishAmblypomacentrus kuiteri
KukumaiBathybagrus grandis
Kukwari sea catfishNotarius phrygiatus
Kulbicki's pipefishFestucalex kulbickii
Kulbicki's triplefinSpringerichthys kulbickii
KululuSarotherodon steinbachi
KumakumaBrachyplatystoma filamentosum
GameKumaon snowtroutSchizothorax kumaonensis
Kumawa rainbowfishMelanotaenia sneideri
Kuna gobyCoryphopterus kuna
KunapariChaetobranchus flavescens
Kunar snowtroutSchizothorax labiatus
KunimasuOncorhynchus kawamurae
Kunming catfishSilurus mento
Kupang cardinalfishOstorhinchus wassinki
Kupang pony fishEubleekeria kupanensis
Kura barbelBarbus lacerta
Kura bleakAlburnus filippii
Kura chubAlburnoides eichwaldii
Kura gobyPonticola cyrius
Kura gudgeonRomanogobio persus
Kura loachOxynoemacheilus brandtii
Kura naseChondrostoma cyri
Kurchatov's notoliparisNotoliparis kurchatovi
Kuril prickled eelpoutKrusensterniella kurilensis
Kuronuma's whiptailSpicomacrurus kuronumai
Kurt's coralblennyEcsenius kurti
Kusanagi snake eelOphichthus kusanagi
Kuschakewitsch loachIskandaria kuschakewitschi
Kutubu hardyheadCraterocephalus lacustris
Kutubu tandanOloplotosus torobo
Kwangtung skateDipturus kwangtungensis
Kwazulu sweeperParapriacanthus kwazulu
Kyushu bitterlingRhodeus atremius