Species
Browsing 1,518 species. Use the filters below to narrow down.
Kane's cory
FishCorydoras kanei
A small, spotted cory from blackwater rivers that breathes air and charms beginners.
Karnataka Labeo
FishLabeo calbasu
A large, algae-grazing river fish best appreciated outside the home aquarium.
Katvis
FishPimelodus ornatus
A bold, predatory catfish with toxic spines and serious schooling instincts.
Kenyi Cichlid
FishPseudotropheus lombardoi
A notoriously aggressive mbuna with a dramatic reverse color scheme between sexes.
Keyhole Cichlid
FishCleithracara maronii
A gentle, shy cichlid whose camouflage trick is straight out of a nature documentary.
Killifish
FishAustrolebias adloffi
A tiny annual killifish that races through its entire life cycle in months.
Kissing Gourami
FishHelostoma temminkii
The infamous 'kissing fish' hides a complicated personality behind its pucker.
Kissing Prochilodus
FishSemaprochilodus insignis
A migratory Amazon grazer that plays a surprising ecological role in the wild.
Knife Livebearer
FishAlfaro cultratus
A tough little livebearer with a blade-like keel and a feisty personality.
Knobnose Whiptail Catfish
FishHemiodontichthys acipenserinus
The only catfish where dad carries the eggs on his lips.
Kooli Barb
FishPuntius vittatus
A peaceful little barb from rice fields and streams, best kept in lively groups.
Korean Bitterling
FishAcheilognathus signifer
A Korean bitterling with one of the most bizarre spawning strategies in freshwater fish
Kotsovato
FishParetroplus kieneri
A peaceful Malagasy cichlid rarely seen outside specialist collections.
Krabi Mouth Brooding Betta
FishBetta simplex
A rare mouth-brooding betta from Thailand's limestone streams, peaceful by betta standards.
Krauss' Basketmouth
FishCaquetaia kraussii
A predatory Colombian cichlid that lurks in swamps and ambushes its prey.
Kribensis
FishPelvicachromis pulcher
A beginner-friendly cichlid that breeds willingly and parents like a pro.
Kribensis
FishPelvicachromis subocellatus
A cave-spawning dwarf cichlid whose females put on a dazzling courtship display.
Kuhli Loach
FishPangio kuhlii
The eel-like bottom dweller that disappears for weeks and reappears at midnight.
Kuhli Loach
FishPangio cuneovirgata
A rare kuhli lookalike from blackwater peat swamps, seldom seen outside expert collections.
Kuhli Loach
FishPangio filinaris
A slender, plain-bodied eel loach from the forested streams of peninsular Malaysia.
Kuhli Loach
FishPangio malayana
A slender kuhli loach relative that travels incognito in mixed shipments
Kuhli Loach
FishPangio piperata
A speckled, secretive kuhli loach that turns up as a mystery in mixed shipments.
Kumakuma
FishBrachyplatystoma filamentosum
One of the largest freshwater fish on Earth, and reportedly a danger to humans.
L200
FishBaryancistrus demantoides
A territorial Venezuelan pleco with vivid spots and a noticeably tall dorsal fin.
L239
FishBaryancistrus beggini
A tiny, dark-bodied pleco with an iridescent blue sheen from Guyana Shield rapids.
Ladder Loach
FishBotia rostrata
A boldly barred loach with a complex social life and real personality.
Lake Inle Red-tailed Loach
FishPetruichthys brevis
A tiny loach from Myanmar's famous Inle Lake, best kept in groups.
Lake Kurumoi Rainbowfish
FishMelanotaenia parva
A rare mountain lake gem that puts on a show at feeding time.
Lake Kutubu Rainbowfish
FishMelanotaenia lacustris
A slow-developing rainbowfish whose true colors take patience to unlock.
Lake Tebera Rainbowfish
FishMelanotaenia herbertaxelrodi
A highland Papua New Guinea gem that rewards patient keepers with vivid color.
Lake Wanam Rainbowfish
FishGlossolepis wanamensis
A critically endangered rainbowfish from a single remote Papua New Guinea lake.
Lambchop Rasbora
FishTrigonostigma espei
A copper-bodied schooler whose distinctive lambchop marking sets it apart from look-alikes.
Lambert's cory
FishCorydoras lamberti
A rare and enigmatic armored catfish from the Peruvian Amazon, best kept in groups.
Lancer Catfish
FishBagrichthys macracanthus
A nocturnal lancer catfish with territorial attitude and a dramatic dorsal spine.
Lancer Catfish
FishBagrichthys majusculus
A secretive Thai catfish with territorial attitude and a spine worth respecting.
Laprade's Bichir
FishPolypterus bichir lapradei
A prehistoric African giant that breathes air and hunts like a predator from another era.