Aquariumpro
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RegionFreshwaterSaltwaterBrackish

The Americas

From the Amazon's blackwater basins to Caribbean reefs — the Americas hold the most popular freshwater biotopes and a wealth of Atlantic and Pacific saltwater life.

765 species · freshwater

Rosy Tetra

Rosy Tetra

Fish

Hyphessobrycon rosaceus

A softly blushing schooling tetra that rewards keepers who think in groups.

Rotpunct Apisto
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Rotpunct Apisto

Fish

Apistogramma alacrina

A pint-sized Colombian dwarf cichlid with a uniquely spotted pectoral fin base.

Royal Farlowella Whiptail Catfish (Tank-Bred)

Royal Farlowella Whiptail Catfish (Tank-Bred)

Fish

Sturisoma panamense

An elegant whiptail catfish that grazes algae and breathes air when needed.

Royal Pleco

Royal Pleco

Fish

Panaque nigrolineatus

A wood-rasping giant with bold racing stripes and a reclusive personality.

Royal Whiptail

Royal Whiptail

Fish

Sturisoma festivum

A sleek, whiskered algae grazer from the Maracaibo basin with a surprising trick up its sleeve.

Ruby Tetra

Ruby Tetra

Fish

Axelrodi riesei

A tiny red gem from Colombia that rewards patient, species-focused keepers.

Rummy Nose Tetra

Rummy Nose Tetra

Fish

Hemigrammus bleheri

A tight-schooling tetra whose vivid red nose blazes brightest in a large group.

Rummy Nose Tetra

Rummy Nose Tetra

Fish

Hemigrammus rhodostomus

The original rummy-nose, built for tight shoals and soft Amazon water.

Saddleback Acara

Saddleback Acara

Fish

Aequidens tetramerus

A wide-ranging South American cichlid with vivid locality color forms worth hunting down.

Saddle Corydoras

Saddle Corydoras

Fish

Corydoras ephippifer

A rarely-seen Amazonian cory with clear fins and a surprisingly long lifespan.

Sailfin Molly

Sailfin Molly

Fish

Poecilia latipinna

The male's enormous sail-like dorsal fin makes this livebearer instantly recognizable.

Sailfin Molly

Sailfin Molly

Fish

Poecilia velifera

The towering dorsal fin of this livebearer is a true showpiece when conditions are right.

Sailfin Pimeloid
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Sailfin Pimeloid

Fish

Leiarius marmoratus

A massive schooling catfish with dramatic fins and a nocturnal personality.

Sailfin Pleco

Sailfin Pleco

Fish

Glyptoperichthys gibbiceps

A decades-long commitment: this armored giant lives longer than most pets.

Sailfin Tetra

Sailfin Tetra

Fish

Crenuchus spilurus

A solitary little predator with theatrical fin displays and devoted fathering instincts.

Salmacis Cory

Salmacis Cory

Fish

Scleromystax salmacis

A tiny armored catfish from Brazilian ponds, with a venomous sting to respect.

Salt and Pepper Cory

Salt and Pepper Cory

Fish

Corydoras habrosus

A pint-sized armored catfish that breathes air and blinks at you.

Salvin's Cichlid

Salvin's Cichlid

Fish

Cichlasoma salvini

Colorful, compact, and surprisingly ferocious. A Central American cichlid with real attitude.

San Domingo Cichlid
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San Domingo Cichlid

Fish

Thorichthys callolepis

A lesser-known Mexican cichlid from swift, rocky headwaters worth a closer look.

Sands' cory

Sands' cory

Fish

Corydoras davidsandsi

A rarely exported Rio Negro cory with a bold split dorsal bar and surprising longevity.

San Francisco Piranha

San Francisco Piranha

Fish

Pygocentrus piraya

The largest piranha, and the one that earns the reputation others borrow.

Santa cruz cory

Santa cruz cory

Fish

Corydoras cruziensis

A tiny armored catfish from Bolivia with a gut that doubles as a lung.

Sarabia Cichlid

Sarabia Cichlid

Fish

Paraneetroplus bulleri

A hardy Mexican cichlid built for fast currents and long-term companionship.

Scale-eating Pupfish
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Scale-eating Pupfish

Fish

Cyprinodon desquamator

A tiny Bahamian pupfish that makes its living stealing scales from other fish.

Scarlet Livebearer
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Scarlet Livebearer

Fish

Micropoecilia picta

A pint-sized livebearer with a taste for brackish water and bold color.

Schwartz's Cory

Schwartz's Cory

Fish

Corydoras schwartzi

A long-lived, armored bottom dweller that genuinely thrives in good company.

Serpae Tetra

Serpae Tetra

Fish

Hyphessobrycon eques

Fiery red schooler that turns fin-nipper when kept in too-small groups.

Seuss' cory

Seuss' cory

Fish

Corydoras seussi

A long-lived Bolivian cory that breathes air and rewards patient keepers.

Severum

Severum

Fish

Heros efasciatus

A gentle giant of the Amazon that plays surprisingly well with others.

Severum

Severum

Fish

Heros severus

A large, easygoing cichlid with personality to spare and a surprisingly gentle nature.

Sheep Pacu

Sheep Pacu

Fish

Acnodon normani

A compact pacu with tiger stripes and a bad habit of snacking on scales.

Sheepshead Pupfish

Sheepshead Pupfish

Fish

Cyprinodon variegatus

A tough little pupfish that thrives where most fish would struggle to survive.

Shining Pencilfish

Shining Pencilfish

Fish

Nannostomus nitidus

A rarely-seen pencilfish with a glittering lateral stripe and fascinating nocturnal color shifts.

Shortfin Molly
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Shortfin Molly

Fish

Poecilia mexicana

The wild ancestor of the molly we all know, built for tough conditions.

Short-lined Pyrrhulina

Short-lined Pyrrhulina

Fish

Pyrrhulina brevis

A compact Amazonian predator with surprising personality for its size.

Shortnose Gar

Shortnose Gar

Fish

Lepisosteus oculatus

A living fossil built for ambush, not the average home aquarium.