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Species

Browsing 1,903 species. Use the filters below to narrow down.

Kamaka Rainbowfish

Kamaka Rainbowfish

Fish

Melanotaenia kamaka

A vividly colored rainbowfish with the active personality to match its appearance.

Kampango

Kampango

Fish

Bagrus meridionalis

A giant Lake Malawi catfish with one of the most complex social lives in freshwater.

Kane's cory

Kane's cory

Fish

Corydoras kanei

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

Kapuas Betta

Kapuas Betta

Fish

Betta krataios

A tiny mouthbrooding betta from Borneo's blackwater streams, best kept in quiet company.

Karnataka Labeo

Karnataka Labeo

Fish

Labeo calbasu

A large, algae-grazing river fish best appreciated outside the home aquarium.

Katvis

Katvis

Fish

Pimelodus ornatus

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

Kenyi Cichlid

Kenyi Cichlid

Fish

Pseudotropheus lombardoi

A notoriously aggressive mbuna with a dramatic reverse color scheme between sexes.

Keyhole Cichlid

Keyhole Cichlid

Fish

Cleithracara maronii

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

Killifish

Killifish

Fish

Austrolebias adloffi

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

Kissing Gourami

Kissing Gourami

Fish

Helostoma temminkii

The infamous 'kissing fish' hides a complicated personality behind its pucker.

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.

Knight's Snakehead

Knight's Snakehead

Fish

Channa pardalis

A leopard-patterned snakehead from India's misty Khasi Hills.

Knobnose Whiptail Catfish

Knobnose Whiptail Catfish

Fish

Hemiodontichthys acipenserinus

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

Kooli Barb

Kooli Barb

Fish

Puntius vittatus

A peaceful little barb from rice fields and streams, best kept in lively groups.

Korean Bitterling

Korean Bitterling

Fish

Acheilognathus signifer

A Korean bitterling with one of the most bizarre spawning strategies in freshwater fish

Korean Doty Barbel

Korean Doty Barbel

Fish

Hemibarbus mylodon

A hefty Korean river barb that rewards simple, spacious setups.

Kotsovato

Kotsovato

Fish

Paretroplus kieneri

A peaceful Malagasy cichlid rarely seen outside specialist collections.

Krabi Mouth Brooding Betta

Krabi Mouth Brooding Betta

Fish

Betta simplex

A rare mouth-brooding betta from Thailand's limestone streams, peaceful by betta standards.

Krauss' Basketmouth

Krauss' Basketmouth

Fish

Caquetaia kraussii

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

Kribensis

Kribensis

Fish

Pelvicachromis pulcher

A beginner-friendly cichlid that breeds willingly and parents like a pro.

Kribensis

Kribensis

Fish

Pelvicachromis subocellatus

A cave-spawning dwarf cichlid whose females put on a dazzling courtship display.

Krieg's Mini Tetra

Krieg's Mini Tetra

Fish

Odontostilbe kriegi

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

Kubuna Hardyhead

Kubuna Hardyhead

Fish

Craterocephalus randi

A slender, active schooler from the clear streams of New Guinea.

Kuhli Loach

Kuhli Loach

Fish

Pangio kuhlii

The eel-like bottom dweller that disappears for weeks and reappears at midnight.

Kuhli Loach

Kuhli Loach

Fish

Pangio cuneovirgata

A rare kuhli lookalike from blackwater peat swamps, seldom seen outside expert collections.

Kuhli Loach

Kuhli Loach

Fish

Pangio filinaris

A slender, plain-bodied eel loach from the forested streams of peninsular Malaysia.

Kuhli Loach

Kuhli Loach

Fish

Pangio malayana

A slender kuhli loach relative that travels incognito in mixed shipments

Kuhli Loach

Kuhli Loach

Fish

Pangio piperata

A speckled, secretive kuhli loach that turns up as a mystery in mixed shipments.

Kuhli Loach

Kuhli Loach

Fish

Pangio sp. "PAN03"

A mystery kuhli loach from Borneo that science hasn't named yet.

Kumakuma

Kumakuma

Fish

Brachyplatystoma filamentosum

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

Kyburz Tetra

Kyburz Tetra

Fish

Pseudochalceus kyburzi

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

L12

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.