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
Sub-regions
Rosy Tetra
FishHyphessobrycon rosaceus
A softly blushing schooling tetra that rewards keepers who think in groups.
Rotpunct Apisto
FishApistogramma alacrina
A pint-sized Colombian dwarf cichlid with a uniquely spotted pectoral fin base.
Royal Farlowella Whiptail Catfish (Tank-Bred)
FishSturisoma panamense
An elegant whiptail catfish that grazes algae and breathes air when needed.
Royal Pleco
FishPanaque nigrolineatus
A wood-rasping giant with bold racing stripes and a reclusive personality.
Royal Whiptail
FishSturisoma festivum
A sleek, whiskered algae grazer from the Maracaibo basin with a surprising trick up its sleeve.
Ruby Tetra
FishAxelrodi riesei
A tiny red gem from Colombia that rewards patient, species-focused keepers.
Rummy Nose Tetra
FishHemigrammus bleheri
A tight-schooling tetra whose vivid red nose blazes brightest in a large group.
Rummy Nose Tetra
FishHemigrammus rhodostomus
The original rummy-nose, built for tight shoals and soft Amazon water.
Saddleback Acara
FishAequidens tetramerus
A wide-ranging South American cichlid with vivid locality color forms worth hunting down.
Saddle Corydoras
FishCorydoras ephippifer
A rarely-seen Amazonian cory with clear fins and a surprisingly long lifespan.
Sailfin Molly
FishPoecilia latipinna
The male's enormous sail-like dorsal fin makes this livebearer instantly recognizable.
Sailfin Molly
FishPoecilia velifera
The towering dorsal fin of this livebearer is a true showpiece when conditions are right.
Sailfin Pimeloid
FishLeiarius marmoratus
A massive schooling catfish with dramatic fins and a nocturnal personality.
Sailfin Pleco
FishGlyptoperichthys gibbiceps
A decades-long commitment: this armored giant lives longer than most pets.
Sailfin Tetra
FishCrenuchus spilurus
A solitary little predator with theatrical fin displays and devoted fathering instincts.
Salmacis Cory
FishScleromystax salmacis
A tiny armored catfish from Brazilian ponds, with a venomous sting to respect.
Salt and Pepper Cory
FishCorydoras habrosus
A pint-sized armored catfish that breathes air and blinks at you.
Salvin's Cichlid
FishCichlasoma salvini
Colorful, compact, and surprisingly ferocious. A Central American cichlid with real attitude.
San Domingo Cichlid
FishThorichthys callolepis
A lesser-known Mexican cichlid from swift, rocky headwaters worth a closer look.
Sands' cory
FishCorydoras davidsandsi
A rarely exported Rio Negro cory with a bold split dorsal bar and surprising longevity.
San Francisco Piranha
FishPygocentrus piraya
The largest piranha, and the one that earns the reputation others borrow.
Santa cruz cory
FishCorydoras cruziensis
A tiny armored catfish from Bolivia with a gut that doubles as a lung.
Sarabia Cichlid
FishParaneetroplus bulleri
A hardy Mexican cichlid built for fast currents and long-term companionship.
Scale-eating Pupfish
FishCyprinodon desquamator
A tiny Bahamian pupfish that makes its living stealing scales from other fish.
Scarlet Livebearer
FishMicropoecilia picta
A pint-sized livebearer with a taste for brackish water and bold color.
Schwartz's Cory
FishCorydoras schwartzi
A long-lived, armored bottom dweller that genuinely thrives in good company.
Serpae Tetra
FishHyphessobrycon eques
Fiery red schooler that turns fin-nipper when kept in too-small groups.
Seuss' cory
FishCorydoras seussi
A long-lived Bolivian cory that breathes air and rewards patient keepers.
Severum
FishHeros efasciatus
A gentle giant of the Amazon that plays surprisingly well with others.
Severum
FishHeros severus
A large, easygoing cichlid with personality to spare and a surprisingly gentle nature.
Sheep Pacu
FishAcnodon normani
A compact pacu with tiger stripes and a bad habit of snacking on scales.
Sheepshead Pupfish
FishCyprinodon variegatus
A tough little pupfish that thrives where most fish would struggle to survive.
Shining Pencilfish
FishNannostomus nitidus
A rarely-seen pencilfish with a glittering lateral stripe and fascinating nocturnal color shifts.
Shortfin Molly
FishPoecilia mexicana
The wild ancestor of the molly we all know, built for tough conditions.
Short-lined Pyrrhulina
FishPyrrhulina brevis
A compact Amazonian predator with surprising personality for its size.
Shortnose Gar
FishLepisosteus oculatus
A living fossil built for ambush, not the average home aquarium.