Species
Browsing 1,299 species. Use the filters below to narrow down.
Nerite Snail
InvertNeritina natalensis
The algae-scrubbing snail that won't overrun your tank.
Network Pleco
FishHypancistrus sp. "L066"
A boldly patterned pleco with a variable maze-like network across its body.
Nile squeaker
FishSynodontis schall
The unpredictable bruiser of the Synodontis world, not for community tanks.
Nile Tilapia
FishOreochromis niloticus niloticus
One of the world's most adaptable fish, but a challenging aquarium resident.
Nilgiri Danio
FishDevario neilgherriensis
A rarely seen Indian hill stream danio with iridescent blue and yellow flanks.
Noble Gourami
FishCtenops nobilis
The noble gourami: a labyrinth fish that spits its eggs straight into dad's mouth.
Nodding Plexaurella
CoralPlexaurella nutans
A tall, branching sea rod that sways gently in moderate reef currents.
Northern Club Coral
CoralClavularia borealis
A cold-water soft coral that surprises with its tolerance for low-light tanks.
Oblique-lined Dottyback
FishCypho purpurascens
A bold little reef predator that punches well above its weight in attitude.
Ocellated Featherback
FishChitala ornata
A prehistoric river predator that grows far larger than most tanks can handle.
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.
Okavango Tilapia
FishTilapia ruweti
A compact African cichlid with big personality from wild swamp habitats.
Olive Nerite Snail
InvertNeritina reclivata
A tough little algae grazer that thrives where fresh and salt water meet.
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.
Opae Ula
InvertHalocaridina rubra
Tiny Hawaiian shrimp that thrives on neglect in brackish anchialine pools.
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.
Orange Ball Anemone
CoralPseudocorynactis caribbeorum
A nocturnal Caribbean predator with sticky orange-tipped tentacles that can snag small fish.
Orange dwarf toothcarp
FishNeoheterandria elegans
A tiny Colombian livebearer with a fascinating near-mammalian reproductive twist.
Orange-fin Stiphodon
FishStiphodon maculidorsalis
A tiny Indonesian stream goby with bold dorsal markings worth seeking out.
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.
Orangespot Surgeonfish
FishAcanthurus olivaceus
A bold orange shoulder-stripe makes this reef surgeon impossible to mistake.
Orchid Island Goby
FishRhinogobius lanyuensis
A tiny island goby from one of Taiwan's most remote corners.
Orinoco
FishAndinoacara sp. "Orinoco"
A mellow Orinoco cichlid that pairs easily and rewards patient breeders.
Orinoco sailfin catfish
FishPterygoplichthys multiradiatus
A dinosaur-sized algae grazer built for decades of service in large tanks.
Otjikoto Tilapia
FishTilapia guinasana
A critically endangered sinkhole cichlid with wild color variation and devoted parental care.
Oval Mushroom Coral
CoralLobactis scutaria
A hardy, low-demand coral that brings bold texture to any reef.
Oyapock Eartheater
FishGeophagus camopiensis
A rarely seen eartheater with elaborate mouthbrooding behavior and real personality.
Ozelot
PlantEchinodorus 'Ozelot'
A beginner-friendly rosette plant that keeps its leopard spots even in low light.
Ozelot Green
PlantEchinodorus 'Ozelot Green'
A bold rosette plant with spotted leaves that thrives even under low light.
Pacific Fat Sleeper
FishDormitator latifrons
A chunky estuarine predator that breathes air and swallows anything it can fit in its mouth.