Species
Browsing 1,801 species. Use the filters below to narrow down.
January Tetra
FishHemigrammus hyanuary
A peaceful little tetra that looks like a stretched head-and-tail light fish.
Japanese medaka
FishOryzias latipes
The first vertebrate to mate in space, now a rewarding nano fish for patient keepers.
Java Barb
FishBarbonymus gonionotus
A large, active schooling barb that needs space and robust tank companions.
Java Combtail
FishBelontia hasselti
A large, territorial labyrinth fish that rewards patient, experienced keepers.
Javaen Barb
FishSystomus orphoides
A boisterous, patterned barb that needs bold tankmates and room to roam.
Java Fightingfish
FishBetta picta
A mild-mannered mouthbrooding betta that makes the whole genus look bad by comparison.
Javan Ricefish
FishOryzias javanicus
A surface-dwelling ricefish with surprisingly complex spawning behavior, rarely seen for sale.
Jello Band Catfish
FishAguarunichthys torosus
A powerfully built Peruvian catfish that treats smaller tankmates as a meal.
Jellybean Tetra
FishLepidarchus adonis
A tiny, transparent West African gem that rewards patient, detail-oriented keepers.
Jelly Bean Tetra
FishLadigesia roloffi
A tiny West African gem that thrives in groups and rewards patient keepers.
Jerdon's Baril
FishBarilius canarensis
A bold, fast-moving schooler from Indian hill streams that needs equally spirited tankmates.
Jerdon's carp
FishHypselobarbus jerdoni
A rare, river-schooling giant from the Western Ghats, seldom seen in the hobby.
Jewel Cichlid
FishHemichromis bimaculatus
Gorgeous West African cichlid that becomes a ferocious defender once paired up.
Jonklaas's Loach
FishLepidocephalichthys jonklaasi
A rare Sri Lankan loach hidden beneath leaf litter, seldom seen in the hobby.
Julii Cory
FishCorydoras julii
A spotted little catfish that blinks, breathes air, and belongs in every peaceful community.
Julii Cory
FishCorydoras trilineatus
Commonly sold as julii cory, this peaceful armored catfish is a beginner-friendly gem.
Jumbie Teta
FishAncistrus cf cirrhosus
The bristlenose catfish: a compact, algae-grazing workhorse with a face only a hobbyist could love.
Jumbo Cory
FishCorydoras multiradiatus
A large, long-snouted cory with a fascinating air-breathing trick up its sleeve.
Jutai
FishApistogramma sp. "Kelleri"
A mouthbrooding dwarf cichlid with a remarkably flexible approach to raising its young.
Kabili Bumblebee Goby
FishBrachygobius kabiliensis
Tiny bumblebee-patterned goby from Borneo's mangroves, surprisingly manageable for new keepers.
Kamaka Rainbowfish
FishMelanotaenia kamaka
A vividly colored rainbowfish with the active personality to match its appearance.
Kampango
FishBagrus meridionalis
A giant Lake Malawi catfish with one of the most complex social lives in freshwater.
Kane's cory
FishCorydoras kanei
A small, spotted cory from blackwater rivers that breathes air and charms beginners.
Kapuas Betta
FishBetta krataios
A tiny mouthbrooding betta from Borneo's blackwater streams, best kept in quiet company.
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.
Knight's Snakehead
FishChanna pardalis
A leopard-patterned snakehead from India's misty Khasi Hills.
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