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
Julii Cory
FishCorydoras trilineatus
Commonly sold as julii cory, this peaceful armored catfish is a beginner-friendly gem.
Jumbie Teta
FishAncistrus cf cirrhosus
The bristlenose catfish: a compact, algae-grazing workhorse with a face only a hobbyist could love.
Jumbo Cory
FishCorydoras multiradiatus
A large, long-snouted cory with a fascinating air-breathing trick up its sleeve.
Jutai
FishApistogramma sp. "Kelleri"
A mouthbrooding dwarf cichlid with a remarkably flexible approach to raising its young.
Kane's cory
FishCorydoras kanei
A small, spotted cory from blackwater rivers that breathes air and charms beginners.
Katvis
FishPimelodus ornatus
A bold, predatory catfish with toxic spines and serious schooling instincts.
Keyhole Cichlid
FishCleithracara maronii
A gentle, shy cichlid whose camouflage trick is straight out of a nature documentary.
Killifish
FishAustrolebias adloffi
A tiny annual killifish that races through its entire life cycle in months.
Kissing Prochilodus
FishSemaprochilodus insignis
A migratory Amazon grazer that plays a surprising ecological role in the wild.
Knife Livebearer
FishAlfaro cultratus
A tough little livebearer with a blade-like keel and a feisty personality.
Knobnose Whiptail Catfish
FishHemiodontichthys acipenserinus
The only catfish where dad carries the eggs on his lips.
Krauss' Basketmouth
FishCaquetaia kraussii
A predatory Colombian cichlid that lurks in swamps and ambushes its prey.
Krieg's Mini Tetra
FishOdontostilbe kriegi
A small, peaceful South American schooler that thrives in the mid-water column.
Kumakuma
FishBrachyplatystoma filamentosum
One of the largest freshwater fish on Earth, and reportedly a danger to humans.
Kyburz Tetra
FishPseudochalceus kyburzi
A peaceful Colombian schooler with a nippy streak worth planning around.
L12
FishAncistomus feldbergae
A rock-dwelling Xingu pleco that grazes algae by night and hides by day.
L128
FishHemiancistrus sp
A spot-patterned Orinoco pleco with a taxonomic identity that's still up for debate.
L200
FishBaryancistrus demantoides
A territorial Venezuelan pleco with vivid spots and a noticeably tall dorsal fin.
L234
FishMegalancistrus sp. "L234"
A massive, aggressive pleco from eastern Brazil that demands respect and space.
L239
FishBaryancistrus beggini
A tiny, dark-bodied pleco with an iridescent blue sheen from Guyana Shield rapids.
L260
FishHypancistrus sp. "L260"
A fine-patterned Tapajós pleco that breeds readily and stays compact.
Lacrimostigmata Cory
FishCorydoras lacrimostigmata
A tiny armored catfish that may mimic its wild neighbors to blend in.
Lambert's cory
FishCorydoras lamberti
A rare and enigmatic armored catfish from the Peruvian Amazon, best kept in groups.
Largespot River Stingray
FishPotamotrygon falkneri
A venomous freshwater predator that can learn to recognize its keeper.
Lattice Dwarf Cichlid
FishNannacara taenia
A quietly charming dwarf cichlid hiding some fascinating breeding behavior beneath plain looks.
Laulao Catfish
FishBrachyplatystoma vaillantii
A river giant that needs a seriously big tank and equally big tankmates.
Leaf Fish
FishMonocirrhus polyacanthus
A dead-leaf impersonator that ambushes prey with a lightning-fast vacuum strike.
Least Killifish
FishHeterandria formosa
One of the world's smallest fish, with a uniquely continuous birthing process.
Lemon Tetra
FishHyphessobrycon pulchripinnis
A subtly beautiful schooling tetra that rewards keepers who buy a proper-sized group.
Leopard Cory
FishCorydoras leopardus
A spotted, air-gulping bottom dweller with a surprisingly long life ahead of it.
Leopard Frog Pleco
FishPeckoltia compta
A compact Brazilian pleco with a bold pattern and a useful breathing trick.
Leopardpleco
FishPseudacanthicus cf leopardus
A spiny, cave-dwelling pleco from the blackwaters of the Rio Negro.
Leopard Pleco
FishPseudacanthicus spinosus
A thorny, wild-looking Amazon pleco with serious attitude to match.
Leopold's Tetra
FishAstyanax leopoldi
A rarely seen South American tetra that rewards patient shoppers with active schooling behavior.
Leucomelas Cory
FishCorydoras leucomelas
A long-lived, peaceful cory that breathes air and blinks its eyes.
Liberty Molly
FishPoecilia salvatoris
A scrappy Central American molly with bold looks and a bold attitude.