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Species

Browsing 1,022 species. Use the filters below to narrow down.

Nodding Plexaurella

Nodding Plexaurella

Coral

Plexaurella nutans

A tall, branching sea rod that sways gently in moderate reef currents.

Oblique-lined Dottyback

Oblique-lined Dottyback

Fish

Cypho purpurascens

A bold little reef predator that punches well above its weight in attitude.

Ocellated Featherback

Ocellated Featherback

Fish

Chitala ornata

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

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.

Olive Nerite Snail

Olive Nerite Snail

Invert

Neritina reclivata

A tough little algae grazer that thrives where fresh and salt water meet.

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.

Opae Ula

Opae Ula

Invert

Halocaridina rubra

Tiny Hawaiian shrimp that thrives on neglect in brackish anchialine pools.

Opsarius ardens

Opsarius ardens

Fish

Barilius ardens

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

Orange Ball Anemone

Orange Ball Anemone

Coral

Pseudocorynactis caribbeorum

A nocturnal Caribbean predator with sticky orange-tipped tentacles that can snag small fish.

Orange dwarf toothcarp

Orange dwarf toothcarp

Fish

Neoheterandria elegans

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

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.

Orangespot Surgeonfish

Orangespot Surgeonfish

Fish

Acanthurus olivaceus

A bold orange shoulder-stripe makes this reef surgeon impossible to mistake.

Orchid Island Goby

Orchid Island Goby

Fish

Rhinogobius lanyuensis

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

Orinoco sailfin catfish

Orinoco sailfin catfish

Fish

Pterygoplichthys multiradiatus

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

Oval Mushroom Coral

Oval Mushroom Coral

Coral

Lobactis scutaria

A hardy, low-demand coral that brings bold texture to any reef.

Oyapock Eartheater

Oyapock Eartheater

Fish

Geophagus camopiensis

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

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 Flowerbud Coral

Pacific Flowerbud Coral

Coral

Anthothela pacifica

A temperate Pacific softcoral that brings cold-water character to the reef tank.

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.

Pajama cardinalfish

Pajama cardinalfish

Fish

Sphaeramia nematoptera

Polka dots, bold racing stripe, and calm enough for any peaceful community reef.

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

Payara

Payara

Fish

Hydrolycus scomberoides

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

Peacock Bass

Peacock Bass

Fish

Cichla kelberi

A hard-hitting Amazonian predator that rewards patient keepers with bold personality.

Peacock Bass

Peacock Bass

Fish

Cichla ocellaris

A river predator that grows to nearly three feet and eats anything it can catch.

Peacock Bass

Peacock Bass

Fish

Cichla orinocensis

A river predator that grows to nearly two feet and eats its tankmates.