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.

816 species · fish

Isthmian Priapella

Isthmian Priapella

Fish

Priapella intermedia

A sleek Mexican livebearer that leaps clear of the water to catch insects.

Jack Dempsey

Jack Dempsey

Fish

Rocio octofasciata

A bold, brawling cichlid named after a boxing legend for good reason.

Jaguar Catfish

Jaguar Catfish

Fish

Liosomadoras oncinus

A boldly patterned nocturnal catfish that fiercely guards its chosen hideout.

Jaguar Cichlid

Jaguar Cichlid

Fish

Parachromis managuensis

A bold, personable predator that owns every tank it inhabits.

Jaguar Guapote

Jaguar Guapote

Fish

Parachromis motaguensis

A bold Central American predator that holds its own against anything in the tank.

Jamaican Killifish
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Jamaican Killifish

Fish

Cubanichthys pengelleyi

A rare Jamaican killifish with clear-water roots and a reputation for challenging its keeper.

January Tetra

January Tetra

Fish

Hemigrammus hyanuary

A peaceful little tetra that looks like a stretched head-and-tail light fish.

Jello Band Catfish

Jello Band Catfish

Fish

Aguarunichthys torosus

A powerfully built Peruvian catfish that treats smaller tankmates as a meal.

Julii Cory

Julii Cory

Fish

Corydoras julii

A spotted little catfish that blinks, breathes air, and belongs in every peaceful community.

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.

King Angelfish

King Angelfish

Fish

Holacanthus passer

A bold Eastern Pacific angel with a single dramatic white stripe across its flank.

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.