Species
Browsing 3,374 species. Use the filters below to narrow down.
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 Anemone
CoralCorynactis parvula
A jewel-toned colonial anemone that thrives in low-light reef corners.
Jewel Anemone
CoralCorynactis viridis
A not-quite-anemone that paints rocky walls in vivid clusters
Jewel Cichlid
FishHemichromis bimaculatus
Gorgeous West African cichlid that becomes a ferocious defender once paired up.
Joker's Boomerang Coral
CoralPolyphyllia novaehiberniae
A free-roaming, boomerang-shaped coral that extends its tentacles even in daylight.
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 angelfish
FishCentropyge tibicen
The biggest dwarf angel, dressed in bold black with a single white patch.
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.
King Angelfish
FishHolacanthus passer
A bold Eastern Pacific angel with a single dramatic white stripe across its flank.
King Conch
InvertAliger gigas
A gentle giant of the seafloor, with one of the most iconic shells in the ocean.
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.
Knobbed Brain Coral
CoralPseudodiploria clivosa
A hardy Caribbean brain coral with distinctively ridged, knobby colonies.
Knobbed Zoanthidean
CoralPalythoa mammillosa
A hardy Atlantic zoanthid with a distinctively bumpy, textured colony surface.
Knobby Cactus Coral
CoralMycetophyllia aliciae
A hardy Caribbean plate coral with bold texture and an easygoing nature.
Knobby Candelabra
CoralEunicea clavigera
A branching Caribbean gorgonian with distinctive knobbly texture and candelabra growth.