Fish beginning with K
- It is an elongate fish with a pike-like body.
- The Kai stingaree is a species of fish in the Urolophidae family.
- The adult size is 6½ cm for males and a slightly larger 7 cm for females .
- Kaluga caviar comes from the Kaluga "River Beluga" sturgeon.
- A nocturnal predator, it feeds largely on smaller demersal Malawi Cichlids.
- The Kanadi kingfish, Scomberomorus plurilineatus, is a species of fish in the family Scombridae.
- The Kanawha Minnow is a species of ray-finned fish in the Cyprinidae family.
- The Kandar is a species of ray-finned fish in the Cyprinidae family.
- The knifetooth sawfish , also known as the pointed sawfish or narrow sawfish, is a sawfish of the family Pristidae, found in the shallow coastal waters and estuaries of the Indo-West Pacific, ranging from the Red Sea and the Persian Gulf to southern Japan, Papua New Guinea and northern Australia.
- The Katapa-tapa is a species of ray-finned fish in the Cyprinidae family.
- The Kavirondo Barb is a species of ray-finned fish in the Cyprinidae family.
- Keeltail needlefish, like all needlefish, closely resemble North American freshwater gars .
- Maylandia lombardoi, is a 13 cm freshwater fish from the family Cichlidae.
- The Kermadec scalyfin, Parma alboscapularis, is a damselfish of the genus Parma, found around New Zealand's Kermadec Islands to depths of between 3 and 20 m, over shallow rocky reef areas.
- The Kermadec triplefin, Enneapterygius kermadecensis, is a triplefin of the family Tripterygiidae, found in tidal rock pools around the Kermadec Islands in the southwest Pacific Ocean.
- Kessler's loach is a species of ray-finned fish in the genus Schistura.
- The keyhole cichlid, Cleithracara maronii, is a cichlid fish endemic to tropical South America, occurring in the Orinoco River basin from Guyana to French Guiana.
- Kiamichi Shiner is a species of ray-finned fish in the genus Notropis.
- Alosa killarnensis is a species of ray-finned fish in the genus Alosa.
- It exhibits sexual dimorphism, with the males having vertical black stripes and the mature females having horizontal black stripes along the sides of their silver-colored bodies.
- The kimberley grunter is a species of fish in the Terapontidae family.
- The Passer Angelfish is a non-migratory tropical fish that inhabits reefs in the eastern Pacific ocean from the coast of Peru north to the California gulf, including offshore islands as far west as the Galapagos, generally at a depth of between 4-30 meters.
- The king dory or lookdown dory, Cyttus traversi, is a dory, in the genus Cyttus, found around South Africa, southern Australia, and New Zealand, over the continental shelf at depths of between 200 and 800 m.
- King SoldierBream is also known as Bowen Snapper, Frying-pan snapper, Frypan bream, Long-spinned red bream, Longfin snapper, Longspine seabream and Red bokako.
- Acanthobrama lissneri is a species of ray-finned fish in the Cyprinidae family.
- The kirikuchi char, Salvelinus japonicus, is a species of fish in the Salmonidae family.
- Typical of gourami, the body is deep and strongly compressed laterally.
- The Ayumodoki or Kissing Loach is a species of ray-finned fish in the Cobitidae family.
Kittipong's cave loach
- Cave fish Schistura jarutanini is a species of ray-finned fish in the Balitoridae family.
- Pumpkinseeds reach a maximum length of about 16 inches , although sizes of 6–8 inches are more typical.
- This is one of the smaller ciscoes.
- Thalassoma rueppellii, or Klunzinger's wrasse, is a species of fish in the Labridae family.
- The knifetooth dogfish, Scymnodon ringens, is a harmless sleeper shark of the family Dalatiidae, found in the eastern Atlantic, from Scotland to Spain, Portugal, and Senegal, and the southwest Pacific from New Zealand, between latitudes 58°N and 15°N, at depths of between 200 and 1,600 m.
- The bignose shark or Knopp's shark, Carcharhinus altimus, is a species of requiem shark, family Carcharhinidae, found worldwide between the latitudes of 40° N and 34° S.
- The Knout Goby inhabits the inshore waters, estuaries, brackish- and fresh-water lagoons of the Black Sea and the Sea of Azov.
- The climbing galaxias is unlikely to be confused with the other diadromous whitebait species because of its shape.
- The Kokoda mogurnda is a species of fish in the Eleotridae family.
- Kolus is a species of ray-finned fish in the genus Hypselobarbus.
- The kongoro lampeye is a species of fish in the Poeciliidae family.
- The Kuiter's deepsea clingfish, Kopua kuiteri, is a clingfish of the family Gobiesocidae, found only off New South Wales, Australia, at depths of between 90 and 110 m.
- Like sticklebacks, its feeds on small invertebrates and fish larvae.
- Korhi Barb is a species of ray-finned fish in the genus Hypselobarbus.
- Oreochromis korogwe is a species of fish in the Cichlidae family.
- Kosswigobarbus kosswigi is a species of cyprinid fish of the monotypic genus Kosswigobarbus.
- Krishna Carp is a species of ray-finned fish in the genus Hypselobarbus.
- Examples of this distinctively shaped, translucent fish used to be assigned to the long-established species K.
- Kuban's Nase is a species of ray-finned fish in the genus Chondrostoma.
- The Hawaiian flagtail is a species of the genus of flagtail fishes.
- Kura Barbel is a species of ray-finned fish in the genus Barbus.
- Kura Loach is a species of ray-finned fish in the genus Barbatula.
- Kura Nase is a species of ray-finned fish in the genus Chondrostoma.
- Kuria Labeo , is a carp of the Cyprinidae family
- Kuschakewitsch loach is a species of ray-finned fish in the genus Nemacheilus.
- The Black Sea Roach is a species of ray-finned fish in the Cyprinidae family.
- Alewives are perhaps best known for their invasion of the Great Lakes by using the Welland Canal to bypass Niagara Falls.
- The fish reaches a size of up to 6 centimetres , and is native to freshwater habitats with a pH of 6.