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.
1,013 species
Sub-regions
Red Hook Silver Dollar
FishMyloplus rubripinnis
A coin-shaped giant with a bold red fin and a serious appetite for plants.
Red Line Tetra
FishHyphessobrycon amapaensis
A tiny, rarely seen Brazilian tetra with vivid red and cream lateral striping.
Red Lips
FishSatanoperca rhynchitis
A gregarious French Guiana cichlid with distinctive red lips and surprising gentleness outside of spawning.
Red Lizard Catfish
FishRineloricaria sp
A slender, peaceful whiptail with a mysterious origin and surprisingly easy breeding behavior.
Red Lyretail Swordtail
FishXiphophorus helleri
A selectively bred swordtail with a ruffled dorsal fin and deep crimson color throughout.
Red Mouth Headstander
FishAnostomus ternetzi
A boldly striped headstander that swims at its own angle. Literally.
Red Orange Neon
FishPseudomugil sp. "Red Neon"
Tiny, vivid, and electric. A micro-rainbow that rewards patient keepers.
Red Pencilfish
FishNannostomus mortenthaleri
A tiny, fiery Peruvian pencilfish that punches well above its weight in attitude.
Red Phantom Tetra
FishHyphessobrycon sweglesi
A deep-red schooling tetra that rewards you for keeping bigger groups.
Red Ramshorn
InvertPlanorbella duryi
A peaceful, easy-to-keep snail that comes in surprisingly vivid color forms.
Red Root Floaters
PlantPhyllanthus fluitans
A fast-spreading floater with vivid red roots that shrimp absolutely love.
Red Soft Coral
CoralGersemia rubiformis
A cold-water soft coral that brings vivid color to temperate reef tanks.
Redspot Cichlid
FishAmphilophus calobrensis
A rare Panamanian cichlid with a ferocious personality and fascinating parental behavior.
Red-spotted Copeina
FishCopella eigenmanni
A small, peaceful Amazonian schooler with subtle charm and fascinating breeding behavior.
Redspotted Tetra
FishCopeina guttata
A paternal nest-guarder from the Amazon with bold red spots and real personality.
Redstriped Eartheater
FishGeophagus surinamensis
A mouthbrooding digger that sifts sand and fiercely guards its young.
Red Swamp Crayfish
InvertProcambarus clarkii
Hardy, bold, and endlessly entertaining. But a menace to planted tanks.
Redtail Catfish
FishPhractocephalus hemioliopterus
A gorgeous river giant that almost no home aquarium can truly accommodate.
Red-tailed Flag Tetra
FishHyphessobrycon agulha
A rare, peaceful tetra that anchors its entire species group by name.
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 Tree Coral
CoralPrimnoa pacifica
A cold-water Pacific gorgonian that brings dramatic branching structure to the display tank.
Red Wolf Fish
FishErythrinus erythrinus
A bold, air-breathing predator that mimics killifish as a juvenile to lure prey
Regal Sea Fan
CoralLeptogorgia hebes
A branching sea fan from the Atlantic coast, built for strong currents.
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.
Ribbon Coral
CoralAgaricia tenuifolia
A Caribbean frond coral that thrives under low light and gentle flow.
Ridgeless Cactus Coral
CoralMycetophyllia reesi
A smooth, plate-like Caribbean coral with no ridges and an understated charm.
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.
Robust Ivory Tree Coral
CoralOculina robusta
A sturdy, branching Atlantic coral that thrives where others struggle with murky water.
Rocio spinosissima
FishArchocentrus spinosissimus
A spiny Central American cichlid from Guatemala's Lake Izabal basin, rarely seen in the hobby.