kaardrog [Netherlands and Belgium] – synonym of Raja fullonica
kabaila [Tunesia, Algeria, Morocco] – synonym of Scomber japonicus
kabaília [Tunesia, Algeria, Morocco] – synonym of Scomber scombrus
kabeljauw[Netherlands and Belgium] – synonym of Gadus morhua
kahlaia [Tunesia, Algeria, Morocco] – synonym of Oblada melanura
kahlayoum [Tunesia, Algeria, Morocco] – synonym of Chelon labrosus
kalb bahr [Tunesia, Algeria, Morocco] – synonym of Carcharodon carcharias
kalb habr [Tunesia, Algeria, Morocco] – synonym of Galeus melastomus
kanjac [former Yugoslavia] – synonym of Serranus cabrilla
kannuta [Ar – synonym of Spondyliosoma cantharus
kantor [former Yugoslavia] – synonym of Spondyliosoma cantharus
karenteen sea bream [UK and USA] – synonym of Crenidens crenidens
kars [Tunesia, Algeria, Morocco] – synonym of Odontaspis ferox
karus [Tunesia, Algeria, Morocco] – synonym of Dicentrarchus labrax
karus [Tunesia, Algeria, Morocco] – synonym of Dicentrarchus punctatus
kathaai [Netherlands and Belgium] – synonym of Scyliorhinus stellaris
Kaup's arrowtooth eel [UK and USA] – synonym of Synaphobranchus kaupi
keeltail needlefish [UK and USA] – synonym of Platybelone argalus
kelb el bahar [Tunesia, Algeria, Morocco] – synonym of Mustelus asterias
kever [Netherlands and Belgium] – synonym of Trisopterus esmarki
kheddir [Tunesia, Algeria, Morocco] – synonym of Labrus bimaculatus
kheddir [Tunesia, Algeria, Morocco] – synonym of Labrus merula
kheddir [Tunesia, Algeria, Morocco] – synonym of Labrus viridis
king of the Herrings [UK and USA] – synonym of Regalecus glesne
king of the herrings [UK and USA] – synonym of Trachipterus arcticus
kingfish [UK and USA] – synonym of Caranx hippos
kinjusa [former Yugoslavia] – synonym of Symphodus ocellatus
kinjusà [former Yugoslavia] – synonym of Symphodus roissali
kirnja glavulja [former Yugoslavia] – synonym of Polyprion americanus
kirnja ligaca [former Yugoslavia] – synonym of Epinephelus alexandrinus
kirnja [former Yugoslavia] – synonym of Epinephelus guaza
Kitefin shark [UK and USA] – synonym of Dalatias licha
klein's sole [UK and USA] – synonym of Solea kleinii
kleine koornaarvis [Netherlands and Belgium] – synonym of Atherina boyeri
kleine pieterman [Netherlands and Belgium] – synonym of Echiichthys vipera
kleine roodbaars [Netherlands and Belgium] – synonym of Sebastes viviparus
kleine slakdolf [Netherlands and Belgium] – synonym of Liparis montagui
kleine wormzeenaald [Netherlands and Belgium] – synonym of Nerophis lumbriciformis
kleine zeenaald [Netherlands and Belgium] – synonym of Syngnathus rostellatus
kleinoogrog [Netherlands and Belgium] – synonym of Raja microocellata
kleurige grondel [Netherlands and Belgium] – synonym of Pomatoschistus pictus
kliplipvis [Netherlands and Belgium] – synonym of Ctenolabrus rupestris
Kljukanov, 1969, 48 (1): 108, fig. 1, 4 (1), 5 (1), 6 (1-2). – synonym of Osmerus eperlanus
kner's goby [UK and USA] – synonym of Pomatoschistus knerii
knez du guja [former Yugoslavia] – synonym of Coris julis
Knifetooth dogfish [UK and USA] – synonym of Scymnodon ringens
knout goby [UK and USA] – synonym of Mesogobius batrachocephalus
Koefoed's searsid [UK and USA] – synonym of Searsia koefoedi
koefoed's smooth-head [UK and USA] – synonym of Bellocia koefoedi
kolombatovic's goby [UK and USA] – synonym of Chromogobius zebratus
kongr [Tunesia, Algeria, Morocco] – synonym of Conger conger
koning van de poon [Netherlands and Belgium] – synonym of Mullus surmuletus
koningsvis [Netherlands and Belgium] – synonym of Lampris guttatus
konj [former Yugoslavia] – synonym of Sciaena umbra
koolvis [Netherlands and Belgium] – synonym of Pollachius virens
koornaarvis [Netherlands and Belgium] – synonym of Atherina presbyter
koscenjak [former Yugoslavia] – synonym of Squalus acanthias
kosirica [former Yugoslavia] – synonym of Symphodus melops
kostilj [former Yugoslavia] – synonym of Squalus blainvillei
krb [former Yugoslavia] – synonym of Argyrosomus regius
Krefft's ray [UK and USA] – synonym of Raja kreffti
krefft's smooth-head [UK and USA] – synonym of Herwigia kreffti
Krøyer, 1852-1853: 784 813, fig. | Maurin and Bonnet, 1970: 45. – synonym of Chimaera monstrosa
ktat [Tunesia, Algeria, Morocco] – synonym of Scyliorhinus canicula
kucina [former Yugoslavia] – synonym of Isurus oxyrinchus
kucina [former Yugoslavia] – synonym of Lamna nasus
kuller [Netherlands and Belgium] – synonym of Melanogrammus aeglefinus
kurjal [former Yugoslavia] – synonym of Umbrina cirrosa