Species
Browsing 1,903 species. Use the filters below to narrow down.
Noble Gourami
FishCtenops nobilis
The noble gourami: a labyrinth fish that spits its eggs straight into dad's mouth.
Norman's Lampeye
FishPoropanchax normani
Tiny West African killifish with glowing blue eyes that shimmer in low light.
Northern longsnose cory
FishCorydoras septentrionalis
A long-lived Orinoco bottom-dweller that breathes air and blinks at you.
Northern Purplespotted Gudgeon
FishMogurnda mogurnda
A bold Australian bottom-dweller with real personality and surprising breeding behavior.
Northern Rainbowfish
FishMelanotaenia affinis
One of the first rainbowfish in the hobby, now available in several wild forms.
Northern Snakehead
FishChanna argus
A true apex predator that can survive days out of water. And is banned in many countries.
Oaxaca Cichlid
FishVieja zonata
A rare Mexican cichlid with big personality and even bigger space requirements.
Obliquidens Hap
FishHaplochromis obliquidens
A scrappy Victorian cichlid with a taste for algae and a bold personality.
Ocellated Featherback
FishChitala ornata
A prehistoric river predator that grows far larger than most tanks can handle.
Ocellated Labyrinth Fish
FishCtenopoma muriei
A compact African labyrinth fish that punches above its weight in personality.
Ocellated Snakehead
FishChanna pleurophthalma
Bold ocellus markings and predatory charisma from the peat swamps of Borneo.
Ocellate Freshwater Stingray
FishPotamotrygon motoro
A disc-shaped apex predator that can learn to recognize its keeper.
Ocellifer Catfish
FishSynodontis ocellifer
A hardy West African catfish with bold spots and a long, distinctive adipose fin.
Odessa Barb
FishPethia padamya
A barb with a mysterious past and males that blaze red when rivals are near.
Ogre Catfish
FishAsterophysus batrachus
A gulper catfish that can swallow prey nearly twice its own size.
Okavango Tilapia
FishTilapia ruweti
A compact African cichlid with big personality from wild swamp habitats.
Olga
FishCorydoras simulatus
A rarely documented Colombian cory with a color pattern that keeps even experts guessing.
Olive danio
FishDanio dangila
A large, active danio with impressively long barbels and a rarely seen wild side.
One-lined Pencilfish
FishNannostomus unifasciatus
A tiny pencilfish that swims at a permanent angle, day and night.
Oneline Tetra
FishNannaethiops unitaeniatus
A peaceful little African schooler that deserves far more attention than it gets.
One-spot Eartheater
FishSatanoperca lilith
A rarely traded eartheater with a single bold flank spot and surprising social depth.
One Spot Mouthbrooder
FishBetta unimaculata
A mouthbrooding Betta from Borneo that bucks the aggressive stereotype entirely.
Onespot Squeaker
FishSynodontis notata
A daytime-active catfish with a bold personality to match its bold spot.
One-stripe Spiny Eel
FishMacrognathus aculeatus
A serpentine burrower with a single bold stripe and a secretive personality.
Opsarius ardens
FishBarilius ardens
A fast-moving Western Ghats minnow that needs space, speed, and bold companions.
Opsarius malabaricus
FishBarilius malabaricus
A fast, bold river minnow from India's Western Ghats that needs room to move.
Oranda Goldfish
FishCarassius auratus var. oranda
The velvet-capped fancy goldfish that rewards patient, attentive keeping.
Orange Chromide
FishEtroplus maculatus
The only cichlid native to India, with a fascinating cleaning-fish side hustle.
Orange Ctenopoma
FishMicroctenopoma ansorgii
A jewel-toned African labyrinth fish that rewards patient, experienced keepers.
Orange dwarf toothcarp
FishNeoheterandria elegans
A tiny Colombian livebearer with a fascinating near-mammalian reproductive twist.
Orange-fin Barb
FishBarbus eutaenia
A sleek African barb from fast, rocky streams that rewards patient keepers.
Orange-fin Stiphodon
FishStiphodon maculidorsalis
A tiny Indonesian stream goby with bold dorsal markings worth seeking out.
Orangefin Tetra
FishBryconops affinis
A restless, fast-moving shoaler from the Guiana Shield's coastal streams.
Orangeflossen
FishLaetacara fulvipinnis
A tiny blackwater cichlid with warm-toned fins and a gentle personality.
Orange Head
FishGeophagus sp. "Orange Head"
A vividly capped cichlid that rewards patient keepers with fascinating mouthbrooding family life.
Orange Poso Rabbit Snail
InvertTylomelania gemmifera
A slow-moving, long-lived freshwater snail with a face only a hobbyist could love.