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Species

Browsing 1,903 species. Use the filters below to narrow down.

Noble Gourami

Noble Gourami

Fish

Ctenops nobilis

The noble gourami: a labyrinth fish that spits its eggs straight into dad's mouth.

Norman's Lampeye

Norman's Lampeye

Fish

Poropanchax normani

Tiny West African killifish with glowing blue eyes that shimmer in low light.

Northern longsnose cory

Northern longsnose cory

Fish

Corydoras septentrionalis

A long-lived Orinoco bottom-dweller that breathes air and blinks at you.

Northern Purplespotted Gudgeon

Northern Purplespotted Gudgeon

Fish

Mogurnda mogurnda

A bold Australian bottom-dweller with real personality and surprising breeding behavior.

Northern Rainbowfish

Northern Rainbowfish

Fish

Melanotaenia affinis

One of the first rainbowfish in the hobby, now available in several wild forms.

Northern Snakehead

Northern Snakehead

Fish

Channa argus

A true apex predator that can survive days out of water. And is banned in many countries.

Oaxaca Cichlid

Oaxaca Cichlid

Fish

Vieja zonata

A rare Mexican cichlid with big personality and even bigger space requirements.

Obliquidens Hap

Obliquidens Hap

Fish

Haplochromis obliquidens

A scrappy Victorian cichlid with a taste for algae and a bold personality.

Ocellated Featherback

Ocellated Featherback

Fish

Chitala ornata

A prehistoric river predator that grows far larger than most tanks can handle.

Ocellated Labyrinth Fish

Ocellated Labyrinth Fish

Fish

Ctenopoma muriei

A compact African labyrinth fish that punches above its weight in personality.

Ocellated Snakehead

Ocellated Snakehead

Fish

Channa pleurophthalma

Bold ocellus markings and predatory charisma from the peat swamps of Borneo.

Ocellate Freshwater Stingray

Ocellate Freshwater Stingray

Fish

Potamotrygon motoro

A disc-shaped apex predator that can learn to recognize its keeper.

Ocellifer Catfish

Ocellifer Catfish

Fish

Synodontis ocellifer

A hardy West African catfish with bold spots and a long, distinctive adipose fin.

Odessa Barb

Odessa Barb

Fish

Pethia padamya

A barb with a mysterious past and males that blaze red when rivals are near.

Ogre Catfish

Ogre Catfish

Fish

Asterophysus batrachus

A gulper catfish that can swallow prey nearly twice its own size.

Okavango Tilapia

Okavango Tilapia

Fish

Tilapia ruweti

A compact African cichlid with big personality from wild swamp habitats.

Olga

Olga

Fish

Corydoras simulatus

A rarely documented Colombian cory with a color pattern that keeps even experts guessing.

Olive danio

Olive danio

Fish

Danio dangila

A large, active danio with impressively long barbels and a rarely seen wild side.

One-lined Pencilfish

One-lined Pencilfish

Fish

Nannostomus unifasciatus

A tiny pencilfish that swims at a permanent angle, day and night.

Oneline Tetra

Oneline Tetra

Fish

Nannaethiops unitaeniatus

A peaceful little African schooler that deserves far more attention than it gets.

One-spot Eartheater

One-spot Eartheater

Fish

Satanoperca lilith

A rarely traded eartheater with a single bold flank spot and surprising social depth.

One Spot Mouthbrooder

One Spot Mouthbrooder

Fish

Betta unimaculata

A mouthbrooding Betta from Borneo that bucks the aggressive stereotype entirely.

Onespot Squeaker

Onespot Squeaker

Fish

Synodontis notata

A daytime-active catfish with a bold personality to match its bold spot.

One-stripe Spiny Eel

One-stripe Spiny Eel

Fish

Macrognathus aculeatus

A serpentine burrower with a single bold stripe and a secretive personality.

Opsarius ardens

Opsarius ardens

Fish

Barilius ardens

A fast-moving Western Ghats minnow that needs space, speed, and bold companions.

Opsarius malabaricus

Opsarius malabaricus

Fish

Barilius malabaricus

A fast, bold river minnow from India's Western Ghats that needs room to move.

Oranda Goldfish

Oranda Goldfish

Fish

Carassius auratus var. oranda

The velvet-capped fancy goldfish that rewards patient, attentive keeping.

Orange Chromide

Orange Chromide

Fish

Etroplus maculatus

The only cichlid native to India, with a fascinating cleaning-fish side hustle.

Orange Ctenopoma

Orange Ctenopoma

Fish

Microctenopoma ansorgii

A jewel-toned African labyrinth fish that rewards patient, experienced keepers.

Orange dwarf toothcarp

Orange dwarf toothcarp

Fish

Neoheterandria elegans

A tiny Colombian livebearer with a fascinating near-mammalian reproductive twist.

Orange-fin Barb

Orange-fin Barb

Fish

Barbus eutaenia

A sleek African barb from fast, rocky streams that rewards patient keepers.

Orange-fin Stiphodon

Orange-fin Stiphodon

Fish

Stiphodon maculidorsalis

A tiny Indonesian stream goby with bold dorsal markings worth seeking out.

Orangefin Tetra

Orangefin Tetra

Fish

Bryconops affinis

A restless, fast-moving shoaler from the Guiana Shield's coastal streams.

Orangeflossen

Orangeflossen

Fish

Laetacara fulvipinnis

A tiny blackwater cichlid with warm-toned fins and a gentle personality.

Orange Head

Orange Head

Fish

Geophagus sp. "Orange Head"

A vividly capped cichlid that rewards patient keepers with fascinating mouthbrooding family life.

Orange Poso Rabbit Snail

Orange Poso Rabbit Snail

Invert

Tylomelania gemmifera

A slow-moving, long-lived freshwater snail with a face only a hobbyist could love.