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.
739 species · freshwater · fish
Sub-regions
Red-tailed Freshwater Barracuda, Spotted Cachorro
FishAcestrorhynchus falcatus
A pike-like ambush predator that minds its manners with fish it can't swallow.
Redtail Splitfin
FishXenotoca eiseni
A hardy livebearer with a nasty streak and genuinely fascinating reproductive biology.
Red Terror
FishCichlasoma festae
A massive, fierce Ecuadorian cichlid that will eat anything it can fit in its mouth.
Red Wolf Fish
FishErythrinus erythrinus
A bold, air-breathing predator that mimics killifish as a juvenile to lure prey
Reticulate Freshwater Stingray
FishPotamotrygon orbignyi
A manageable freshwater ray for those ready to step up to serious specialist keeping.
Reynoldsi Cory
FishCorydoras reynoldsi
A tiny Colombian cory with a surprisingly long life and some endearing quirks.
Ringtailed Pike Cichlid
FishCrenicichla saxatilis
A torpedo-shaped predator from Suriname's creeks, built to ambush and dominate.
Rio Napo cory
FishCorydoras napoensis
A tiny armored catfish from Ecuador that rewards patient keepers with decades of personality.
Ripsaw Catfish
FishMegalodoras uranoscopus
A gentle giant catfish from the Amazon that travels in groups and growls.
River Goby
FishAwaous banana
A sand-sifting river giant that grazes algae like an aquatic lawnmower.
Robusta Cory
FishCorydoras robustus
One of the largest corys around, rarely seen and worth the hunt.
Rocio spinosissima
FishArchocentrus spinosissimus
A spiny Central American cichlid from Guatemala's Lake Izabal basin, rarely seen in the hobby.
Rose Common Pleco
FishHypostomus roseopunctatus
A hefty South American pleco with an unusual ability to breathe air.
Rosette River Stingray
FishPotamotrygon schroederi
A rare, patterned freshwater ray that demands respect and serious commitment.
Rosy Basketmouth
FishCaquetaia spectabilis
A bold Amazonian cichlid that pairs for life and defends its brood fiercely.
Rosy Tetra
FishHyphessobrycon bentosi
A rosy, fin-flaring little characin that puts on its best show in a crowd.
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.