All aquarium species: K
All species whose common name starts with K, in alphabetical order. Each card links to its care guide.
51 species and 5 varieties
Kadlec's notho
Nothobranchius kadleci
Freshwater2.4 in (6 cm) · 11 gal (40 L)72–79°F (22–26°C)
Kaligono
Nimbochromis polystigma
Freshwater10.2 in (26 cm) · 74 gal (280 L)75–82°F (24–28°C)
Kallman's swordtail
Xiphophorus kallmani
Freshwater4.1 in (10.5 cm) · 29 gal (110 L)73–82°F (23–28°C)
Kamaka rainbowfish
Melanotaenia kamaka
Freshwater2.8 in (7 cm) · 29 gal (110 L)77–86°F (25–30°C)
Kampango
Bagrus meridionalis
Freshwater59.1 in (150 cm) · 1,057 gal (4,000 L)73–82°F (23–28°C)
Kane's cory
Hoplisoma kanei
Freshwater1.8 in (4.5 cm) · 15 gal (55 L)75–82°F (24–28°C)
Kelberi peacock bass
Cichla kelberi
Freshwater23.6 in (60 cm) · 396 gal (1,500 L)77–86°F (25–30°C)
Kendall's lamprologus
Lepidiolamprologus kendalli
Freshwater6.3 in (16 cm) · 79 gal (300 L)75–81°F (24–27°C)
Kenya tree coral
Capnella
Saltwater9.8 in (25 cm) · 11 gal (40 L)75–81°F (24–27°C)
Kenyi cichlid
Maylandia lombardoi
Freshwater5.5 in (14 cm) · 53 gal (200 L)75–82°F (24–28°C)
Kerala garra
Garra surendranathanii
Freshwater5.9 in (15 cm) · 42 gal (160 L)68–79°F (20–26°C)
Keyhole angelfish
Centropyge tibicen
Saltwater7.9 in (20 cm) · 70 gal (265 L)72–79°F (22–26°C)
Keyhole cichlid
Cleithracara maronii
Freshwater4.3 in (11 cm) · 25 gal (95 L)70–82°F (21–28°C)
Kidder's livebearer
Carlhubbsia kidderi
Freshwater2 in (5 cm) · 14 gal (54 L)72–81°F (22–27°C)
King angelfish
Holacanthus passer
Saltwater13.8 in (35 cm) · 151 gal (570 L)72–81°F (22–27°C)
King Koopa nerite
Neritina juttingae
FreshwaterBrackish1 in (2.5 cm) · 5 gal (20 L)72–82°F (22–28°C)
King tiger pleco (L066)
Hypancistrus seideli
Freshwater5.1 in (13 cm) · 40 gal (150 L)79–84°F (26–29°C)
Kingsizei zebra
Maylandia pulpican
Freshwater3.5 in (9 cm) · 42 gal (160 L)75–82°F (24–28°C)
Kisaki nothobranch
Nothobranchius flammicomantis
Freshwater2.2 in (5.5 cm) · 11 gal (40 L)72–79°F (22–26°C)
Kissing gourami
Helostoma temminckii
Freshwater9.8 in (25 cm) · 36 gal (135 L)72–86°F (22–30°C)
Kissing prochilodus
Semaprochilodus insignis
Freshwater13.8 in (35 cm) · 135 gal (510 L)73–84°F (23–29°C)
Kitty tetra
Hyphessobrycon heliacus
Freshwater1.3 in (3.4 cm) · 12 gal (45 L)72–82°F (22–28°C)
Kiwinge hap
Dimidiochromis kiwinge
Freshwater11.8 in (30 cm) · 159 gal (600 L)75–81°F (24–27°C)
Klasio rainbowfish
Melanotaenia klasioensis
Freshwater4.2 in (10.6 cm) · 42 gal (160 L)75–84°F (24–29°C)
Klein's butterflyfish
Chaetodon kleinii
Saltwater5.9 in (15 cm) · 79 gal (300 L)75–81°F (24–27°C)
Knaack's cory
Hoplisoma knaacki
Freshwater1.8 in (4.5 cm) · 16 gal (60 L)73–81°F (23–27°C)
Knife livebearer
Alfaro cultratus
Freshwater3 in (7.6 cm) · 32 gal (120 L)75–82°F (24–28°C)
Knight goby
Stigmatogobius sadanundio
FreshwaterBrackish3.5 in (9 cm) · 21 gal (80 L)68–79°F (20–26°C)
Knobby sea rod
Eunicea sp.
Saltwater17.7 in (45 cm) · 26 gal (100 L)73–81°F (23–27°C)
Koh Chang loach
Schistura kohchangensis
Freshwater3.5 in (9 cm) · 24 gal (90 L)72–81°F (22–27°C)
Koi
Cyprinus rubrofuscus
Freshwater23.6 in (60 cm) · 264 gal (1,000 L)39–81°F (4–27°C)5 varieties
Kole tang
Ctenochaetus strigosus
Saltwater7.1 in (18 cm) · 79 gal (300 L)75–81°F (24–27°C)
Konings' peacock
Aulonocara koningsi
Freshwater4.3 in (11 cm) · 63 gal (240 L)75–81°F (24–27°C)
Konings' zebra
Maylandia koningsi
Freshwater3.1 in (8 cm) · 42 gal (160 L)75–82°F (24–28°C)
Konye cichlid
Konia eisentrauti
Freshwater4.3 in (11 cm) · 53 gal (200 L)73–81°F (23–27°C)
Koran angelfish
Pomacanthus semicirculatus
Saltwater15.7 in (40 cm) · 132 gal (500 L)73–81°F (23–27°C)
Korthaus rasbora
Pectenocypris korthausae
Freshwater1.7 in (4.2 cm) · 14 gal (54 L)73–82°F (23–28°C)
Krabi mouthbrooder
Betta simplex
Freshwater2.4 in (6 cm) · 16 gal (60 L)73–82°F (23–28°C)
Krataios betta
Betta krataios
Freshwater2.2 in (5.5 cm) · 14 gal (54 L)73–82°F (23–28°C)
Krenakore tetra
Hyphessobrycon krenakore
Freshwater1.4 in (3.5 cm) · 15 gal (55 L)72–81°F (22–27°C)
Kribensis
Pelvicachromis pulcher
Freshwater3.9 in (10 cm) · 20 gal (75 L)75–81°F (24–27°C)
Krieg's tetra
Serrapinnus kriegi
Freshwater0.9 in (2.4 cm) · 11 gal (40 L)68–79°F (20–26°C)
Kubuna hardyhead
Craterocephalus randi
Freshwater3.1 in (8 cm) · 30 gal (112 L)72–82°F (22–28°C)
Kuehne's white cloud minnow
Tanichthys kuehnei
Freshwater1.5 in (3.7 cm) · 14 gal (54 L)64–75°F (18–24°C)Kuehnei betta
Betta kuehnei
Freshwater2.4 in (6 cm) · 16 gal (60 L)70–77°F (21–25°C)
Kuekenthal's halfbeak
Hemirhamphodon kuekenthali
Freshwater3.3 in (8.5 cm) · 20 gal (75 L)73–81°F (23–27°C)
Kuhli cat
Amphilius platychir
Freshwater4.3 in (11 cm) · 30 gal (112 L)68–77°F (20–25°C)
Kuhli loach
Pangio kuhlii
Freshwater3.9 in (10 cm) · 20 gal (75 L)72–82°F (22–28°C)
Kullander's dwarf cichlid
Apistogramma kullanderi
Freshwater3.9 in (10 cm) · 29 gal (110 L)72–81°F (22–27°C)
Kwai garra
Garra fluviatilis
Freshwater3.9 in (10 cm) · 29 gal (110 L)72–81°F (22–27°C)
Kyburz tetra
Pseudochalceus kyburzi
Freshwater3.1 in (7.8 cm) · 29 gal (110 L)72–81°F (22–27°C)
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