Species
Browsing 1,022 species. Use the filters below to narrow down.
Nodding Plexaurella
CoralPlexaurella nutans
A tall, branching sea rod that sways gently in moderate reef currents.
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.
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.
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.
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 sailfin catfish
FishPterygoplichthys multiradiatus
A dinosaur-sized algae grazer built for decades of service in large tanks.
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.
Pacific Fat Sleeper
FishDormitator latifrons
A chunky estuarine predator that breathes air and swallows anything it can fit in its mouth.
Pacific Flowerbud Coral
CoralAnthothela pacifica
A temperate Pacific softcoral that brings cold-water character to the reef tank.
Pacific Molly
FishPoecilia butleri
A personable little livebearer that grazes algae and practically eats from your hand.
Pacu
FishPiaractus mesopotamicus
A seed-crunching giant from South American floodplains that outgrows almost any home aquarium.
Pajama cardinalfish
FishSphaeramia nematoptera
Polka dots, bold racing stripe, and calm enough for any peaceful community reef.
Panda Loach
FishYaoshania pachychilus
Bold panda stripes as a juvenile, but adults fade to something far subtler.
Pantanal Eartheater
FishSatanoperca pappaterra
A sand-sifting cichlid that fearlessly charges piranhas in the wild.
Paradise Fish
FishMacropodus opercularis
One of the first tropical fish ever kept in Europe, and still worth knowing.
Paradise Threadfin
FishPolynemus paradiseus
Feathery pectoral threads and calm grace from the rivers of South Asia.
Parnaíba Eartheater
FishGeophagus parnaibae
A sand-sifting cichlid from Brazil that's gentler than its reputation suggests.
Parrot Doradid
FishRhynchodoras woodsi
A rarely seen Amazonian catfish with a mysterious bony beak-like projection
Payara
FishHydrolycus scomberoides
Vampire-fanged characin that's surprisingly peaceful with fish too big to eat.
Peacock Bass
FishCichla kelberi
A hard-hitting Amazonian predator that rewards patient keepers with bold personality.
Peacock Bass
FishCichla ocellaris
A river predator that grows to nearly three feet and eats anything it can catch.
Peacock Bass
FishCichla orinocensis
A river predator that grows to nearly two feet and eats its tankmates.