Aquariumpro
🔍
RegionFreshwater

Amazon & South America

The Amazon basin and its sister rivers (Orinoco, Xingu, Tapajós) — home to tetras, cichlids, catfish, and many of the hobby's most iconic freshwater species.

642 species

Ocellate Freshwater Stingray

Ocellate Freshwater Stingray

Fish

Potamotrygon motoro

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

Ogre Catfish

Ogre Catfish

Fish

Asterophysus batrachus

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

Olga

Olga

Fish

Corydoras simulatus

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

One-lined Pencilfish

One-lined Pencilfish

Fish

Nannostomus unifasciatus

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

One-spot Eartheater

One-spot Eartheater

Fish

Satanoperca lilith

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

Orange dwarf toothcarp

Orange dwarf toothcarp

Fish

Neoheterandria elegans

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

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.

Orinoco

Orinoco

Fish

Andinoacara sp. "Orinoco"

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

Orinoco Eartheater

Orinoco Eartheater

Fish

Biotodoma wavrini

A slender eartheater that thrives in groups and rewards patient, experienced keepers.

Orinoco sailfin catfish
✨AI

Orinoco sailfin catfish

Fish

Pterygoplichthys multiradiatus

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

Orinoco Tetra
✨AI

Orinoco Tetra

Fish

Hemigrammus barrigonae

A rare Orinoco tetra that rewards patient keepers willing to seek it out.

Ornate Corydoras

Ornate Corydoras

Fish

Corydoras ornatus

A long-lived Tapajós bottom-dweller that thrives in sociable, peaceful groups.

Oscar

Oscar

Fish

Astronotus ocellatus

The cichlid that recognizes your face and rearranges its own tank.

Otocinclus

Otocinclus

Fish

Otocinclus vittatus

Tiny algae-grazing catfish that plasters itself to glass and plants alike.

Otocinclus affinis

Otocinclus affinis

Fish

Macrotocinclus affinis

Tiny Brazilian algae-eater with a habit of resting right on the front glass.

Otocinclus Catfish (Tank-Bred)

Otocinclus Catfish (Tank-Bred)

Fish

Otocinclus macrospilus

The most commonly sold oto, fragile at first but rewarding once settled.

Otocinclus cocama
✨AI

Otocinclus cocama

Fish

A tiny Peruvian algae grazer with bold, zebra-like blotches and a gentle disposition.

Oyapock Cory

Oyapock Cory

Fish

Corydoras condiscipulus

A long-lived Oyapock armored catfish that breathes air and blinks its eyes.

Oyapock Eartheater
✨AI

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.

Pacu

Pacu

Fish

Piaractus mesopotamicus

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

Painted Sailfin Catfish

Painted Sailfin Catfish

Fish

Leiarius pictus

A majestic sailfin catfish only suited to those with truly enormous tanks.

Palespotted Corydoras

Palespotted Corydoras

Fish

Corydoras gossei

A long-lived, peaceful bottom dweller that breathes air and blinks its eyes.

Panda Cory

Panda Cory

Fish

Corydoras panda

The panda-patterned cory that's as personable as it is peaceful.

Panda Dwarf Cichlid

Panda Dwarf Cichlid

Fish

Apistogramma nijsseni

A panda-patterned dwarf cichlid with fierce maternal instincts and blackwater roots.

Panda Uaru

Panda Uaru

Fish

Uaru fernandezyepezi

A rare Orinoco cichlid that few hobbyists ever get to keep.

Pantanal Eartheater

Pantanal Eartheater

Fish

Satanoperca pappaterra

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

Parnaíba Eartheater
✨AI

Parnaíba Eartheater

Fish

Geophagus parnaibae

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

Parrot Cichlid

Parrot Cichlid

Fish

Hoplarchus psittacus

A rare blackwater cichlid that defies its aggressive reputation in the right company.

Parrot Doradid

Parrot Doradid

Fish

Rhynchodoras woodsi

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

Parrot Pacu
✨AI

Parrot Pacu

Fish

Ossubtus xinguense

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

Pastaza Corydora
✨AI

Pastaza Corydora

Fish

Corydoras pastazensis

A long-lived Ecuadorian armored catfish with a fascinating air-breathing trick.

Patrick's Acara
✨AI

Patrick's Acara

Fish

Aequidens patricki

A rarely traded Peruvian cichlid with a feisty personality and serious collector appeal.

Patwa

Patwa

Fish

Krobia guianensis

A sleek Guianan cichlid that rewards patient keepers with real personality.