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Species

Browsing 819 species. Use the filters below to narrow down.

Nile squeaker

Nile squeaker

Fish

Synodontis schall

The unpredictable bruiser of the Synodontis world, not for community tanks.

Nile Tilapia

Nile Tilapia

Fish

Oreochromis niloticus niloticus

One of the world's most adaptable fish, but a challenging aquarium resident.

Nilgiri Danio

Nilgiri Danio

Fish

Devario neilgherriensis

A rarely seen Indian hill stream danio with iridescent blue and yellow flanks.

Noble Gourami

Noble Gourami

Fish

Ctenops nobilis

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

Ocellated Featherback

Ocellated Featherback

Fish

Chitala ornata

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

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.

Okavango Tilapia

Okavango Tilapia

Fish

Tilapia ruweti

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

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.

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.

Orange dwarf toothcarp

Orange dwarf toothcarp

Fish

Neoheterandria elegans

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

Orange-fin Stiphodon

Orange-fin Stiphodon

Fish

Stiphodon maculidorsalis

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

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.

Orchid Island Goby

Orchid Island Goby

Fish

Rhinogobius lanyuensis

A tiny island goby from one of Taiwan's most remote corners.

Orinoco

Orinoco

Fish

Andinoacara sp. "Orinoco"

A mellow Orinoco cichlid that pairs easily and rewards patient breeders.

Orinoco sailfin catfish

Orinoco sailfin catfish

Fish

Pterygoplichthys multiradiatus

A dinosaur-sized algae grazer built for decades of service in large tanks.

Otjikoto Tilapia

Otjikoto Tilapia

Fish

Tilapia guinasana

A critically endangered sinkhole cichlid with wild color variation and devoted parental care.

Oyapock Eartheater

Oyapock Eartheater

Fish

Geophagus camopiensis

A rarely seen eartheater with elaborate mouthbrooding behavior and real personality.

Ozelot

Ozelot

Plant

Echinodorus 'Ozelot'

A beginner-friendly rosette plant that keeps its leopard spots even in low light.

Ozelot Green

Ozelot Green

Plant

Echinodorus 'Ozelot Green'

A bold rosette plant with spotted leaves that thrives even under low light.

Pacific Fat Sleeper

Pacific Fat Sleeper

Fish

Dormitator latifrons

A chunky estuarine predator that breathes air and swallows anything it can fit in its mouth.

Pacific Molly

Pacific Molly

Fish

Poecilia butleri

A personable little livebearer that grazes algae and practically eats from your hand.

Pacu

Pacu

Fish

Piaractus mesopotamicus

A seed-crunching giant from South American floodplains that outgrows almost any home aquarium.

Panda Loach

Panda Loach

Fish

Yaoshania pachychilus

Bold panda stripes as a juvenile, but adults fade to something far subtler.

Pantanal Eartheater

Pantanal Eartheater

Fish

Satanoperca pappaterra

A sand-sifting cichlid that fearlessly charges piranhas in the wild.

Paradise Fish

Paradise Fish

Fish

Macropodus opercularis

One of the first tropical fish ever kept in Europe, and still worth knowing.

Paradise Threadfin

Paradise Threadfin

Fish

Polynemus paradiseus

Feathery pectoral threads and calm grace from the rivers of South Asia.

Parnaíba Eartheater

Parnaíba Eartheater

Fish

Geophagus parnaibae

A sand-sifting cichlid from Brazil that's gentler than its reputation suggests.

Parrot Doradid

Parrot Doradid

Fish

Rhynchodoras woodsi

A rarely seen Amazonian catfish with a mysterious bony beak-like projection

Parrot Pacu

Parrot Pacu

Fish

Ossubtus xinguense

A plant-munching Xingu oddity that surprises keepers with its feisty personality.

Payara

Payara

Fish

Hydrolycus scomberoides

Vampire-fanged characin that's surprisingly peaceful with fish too big to eat.