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.

739 species · freshwater · fish

Julii Cory

Julii Cory

Fish

Corydoras trilineatus

Commonly sold as julii cory, this peaceful armored catfish is a beginner-friendly gem.

Jumbie Teta

Jumbie Teta

Fish

Ancistrus cf cirrhosus

The bristlenose catfish: a compact, algae-grazing workhorse with a face only a hobbyist could love.

Jumbo Cory

Jumbo Cory

Fish

Corydoras multiradiatus

A large, long-snouted cory with a fascinating air-breathing trick up its sleeve.

Jutai

Jutai

Fish

Apistogramma sp. "Kelleri"

A mouthbrooding dwarf cichlid with a remarkably flexible approach to raising its young.

Kane's cory

Kane's cory

Fish

Corydoras kanei

A small, spotted cory from blackwater rivers that breathes air and charms beginners.

Katvis

Katvis

Fish

Pimelodus ornatus

A bold, predatory catfish with toxic spines and serious schooling instincts.

Keyhole Cichlid

Keyhole Cichlid

Fish

Cleithracara maronii

A gentle, shy cichlid whose camouflage trick is straight out of a nature documentary.

Killifish
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Killifish

Fish

Austrolebias adloffi

A tiny annual killifish that races through its entire life cycle in months.

Kissing Prochilodus

Kissing Prochilodus

Fish

Semaprochilodus insignis

A migratory Amazon grazer that plays a surprising ecological role in the wild.

Knife Livebearer

Knife Livebearer

Fish

Alfaro cultratus

A tough little livebearer with a blade-like keel and a feisty personality.

Knobnose Whiptail Catfish

Knobnose Whiptail Catfish

Fish

Hemiodontichthys acipenserinus

The only catfish where dad carries the eggs on his lips.

Krauss' Basketmouth
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Krauss' Basketmouth

Fish

Caquetaia kraussii

A predatory Colombian cichlid that lurks in swamps and ambushes its prey.

Krieg's Mini Tetra
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Krieg's Mini Tetra

Fish

Odontostilbe kriegi

A small, peaceful South American schooler that thrives in the mid-water column.

Kumakuma
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Kumakuma

Fish

Brachyplatystoma filamentosum

One of the largest freshwater fish on Earth, and reportedly a danger to humans.

Kyburz Tetra
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Kyburz Tetra

Fish

Pseudochalceus kyburzi

A peaceful Colombian schooler with a nippy streak worth planning around.

L12
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L12

Fish

Ancistomus feldbergae

A rock-dwelling Xingu pleco that grazes algae by night and hides by day.

L128

L128

Fish

Hemiancistrus sp

A spot-patterned Orinoco pleco with a taxonomic identity that's still up for debate.

L200

L200

Fish

Baryancistrus demantoides

A territorial Venezuelan pleco with vivid spots and a noticeably tall dorsal fin.

L234

L234

Fish

Megalancistrus sp. "L234"

A massive, aggressive pleco from eastern Brazil that demands respect and space.

L239
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L239

Fish

Baryancistrus beggini

A tiny, dark-bodied pleco with an iridescent blue sheen from Guyana Shield rapids.

L260

L260

Fish

Hypancistrus sp. "L260"

A fine-patterned Tapajós pleco that breeds readily and stays compact.

Lacrimostigmata Cory
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Lacrimostigmata Cory

Fish

Corydoras lacrimostigmata

A tiny armored catfish that may mimic its wild neighbors to blend in.

Lambert's cory
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Lambert's cory

Fish

Corydoras lamberti

A rare and enigmatic armored catfish from the Peruvian Amazon, best kept in groups.

Largespot River Stingray

Largespot River Stingray

Fish

Potamotrygon falkneri

A venomous freshwater predator that can learn to recognize its keeper.

Lattice Dwarf Cichlid

Lattice Dwarf Cichlid

Fish

Nannacara taenia

A quietly charming dwarf cichlid hiding some fascinating breeding behavior beneath plain looks.

Laulao Catfish
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Laulao Catfish

Fish

Brachyplatystoma vaillantii

A river giant that needs a seriously big tank and equally big tankmates.

Leaf Fish

Leaf Fish

Fish

Monocirrhus polyacanthus

A dead-leaf impersonator that ambushes prey with a lightning-fast vacuum strike.

Least Killifish

Least Killifish

Fish

Heterandria formosa

One of the world's smallest fish, with a uniquely continuous birthing process.

Lemon Tetra

Lemon Tetra

Fish

Hyphessobrycon pulchripinnis

A subtly beautiful schooling tetra that rewards keepers who buy a proper-sized group.

Leopard Cory
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Leopard Cory

Fish

Corydoras leopardus

A spotted, air-gulping bottom dweller with a surprisingly long life ahead of it.

Leopard Frog Pleco

Leopard Frog Pleco

Fish

Peckoltia compta

A compact Brazilian pleco with a bold pattern and a useful breathing trick.

Leopardpleco

Leopardpleco

Fish

Pseudacanthicus cf leopardus

A spiny, cave-dwelling pleco from the blackwaters of the Rio Negro.

Leopard Pleco
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Leopard Pleco

Fish

Pseudacanthicus spinosus

A thorny, wild-looking Amazon pleco with serious attitude to match.

Leopold's Tetra

Leopold's Tetra

Fish

Astyanax leopoldi

A rarely seen South American tetra that rewards patient shoppers with active schooling behavior.

Leucomelas Cory

Leucomelas Cory

Fish

Corydoras leucomelas

A long-lived, peaceful cory that breathes air and blinks its eyes.

Liberty Molly
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Liberty Molly

Fish

Poecilia salvatoris

A scrappy Central American molly with bold looks and a bold attitude.