Freshwater fishes

The fish list

499 species, each with the water it needs, who it gets along with, and where it comes from. Find one, or browse by family, genus or river.

Endangered Rare Popular Peaceful Small (6 cm or less)Calm water Strong flow Schooling L-numbers With photo Basic profiles too

Showing: River & region: Southeast Asia ✕

Southeast Asia 11 fish

Betta (Siamese fighting fish)

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Gouramis & bettas · Betta

24–30°C
pH 6–7.5
Calm
2.6 in
Top/mid
Meat
Semi-agg.!

Lone male. Males fight. Keep one, or give each his own space.

Betta (Siamese fighting fish)

Betta splendens

Rice paddies and marshes of Thailand · swamp or paddy

Temperature: 24–30°C
pH: 6–7.5
Adult size: 2.6 in · 6.5 cm
Flow: Calm
Swims: Top and mid-water
Temperament: Semi-aggressive
Diet: Carnivore
Group: 1+
Typical price: $8–40

Lone male. Males fight. Keep one, or give each his own space.

Long fins. Fin nippers will pick on it.

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Photo: ErgoSum88, Public domain

Celestial pearl danio

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Rasboras & danios · DanioStaple

20–26°C
pH 6.5–7.5
Calm
1 in
Mid/bottom
Mixed
Peaceful
6+ group!

Celestial pearl danio

Danio margaritatus

Spring-fed ponds, Shan Plateau, Myanmar · pond

Temperature: 20–26°C
pH: 6.5–7.5
Adult size: 1 in · 2.5 cm
Flow: Calm
Swims: Mid-water and bottom
Temperament: Peaceful
Diet: Omnivore
Group: 6+
Typical price: $4–7
Rarity: Pet-store staple

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Photo: Cisamarc, CC BY-SA 3.0

Chili rasbora

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Rasboras & danios · BorarasStaple

20–28°C
pH 4–7
Calm
0.8 in
Mid
Mixed
Peaceful
8+ group!

Chili rasbora

Boraras brigittae

Peat swamps of southwest Borneo · swamp or paddy

Temperature: 20–28°C
pH: 4–7
Adult size: 0.8 in · 2 cm
Flow: Calm
Swims: Mid-water
Temperament: Peaceful
Diet: Omnivore
Group: 8+
Typical price: $3–5
Rarity: Pet-store staple

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Photo: Daiju Azuma, CC BY-SA 4.0

Clown loach

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Loaches · Chromobotia

25–30°C
pH 6–7.5
Gentle
12 in!
Bottom
Mixed
Peaceful
5+ group

Clown loach

Chromobotia macracanthus

Rivers of Borneo and Sumatra · river

Temperature: 25–30°C
pH: 6–7.5
Adult size: 12 in · 30 cm
Flow: Gentle
Swims: Bottom
Temperament: Peaceful
Diet: Omnivore
Group: 5+
Typical price: $8–20

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Photo: Tommy Kronkvist, CC BY-SA 4.0

Harlequin rasbora

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Rasboras & danios · TrigonostigmaStaple

22–28°C
pH 5–7.5
Calm
1.8 in
Mid
Mixed
Peaceful
8+ group!

Harlequin rasbora

Trigonostigma heteromorpha

Peat swamp streams, Malay Peninsula and Sumatra · swamp or paddy

Temperature: 22–28°C
pH: 5–7.5
Adult size: 1.8 in · 4.5 cm
Flow: Calm
Swims: Mid-water
Temperament: Peaceful
Diet: Omnivore
Group: 8+
Typical price: $3–5
Rarity: Pet-store staple

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Photo: NasserHalaweh, CC BY-SA 4.0

Hillstream loach

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Loaches · Sewellia

20–24°C!
pH 6.5–7.5
Strong!
2.4 in
Bottom
Veg
Peaceful
3+ group

Hillstream loach

Sewellia lineolata

Fast mountain streams of central Vietnam · rapids

Temperature: 20–24°C
pH: 6.5–7.5
Adult size: 2.4 in · 6 cm
Flow: Strong
Swims: Bottom
Temperament: Peaceful
Diet: Grazer
Group: 3+
Typical price: $10–18

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Photo: 5snake5, CC0

Kuhli loach

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Loaches · PangioStaple

24–29°C
pH 5.5–7
Calm
4 in
Bottom
Mixed
Peaceful
5+ group

Kuhli loach

Pangio kuhlii

Peat swamp streams of Malaysia and Indonesia · swamp or paddy

Temperature: 24–29°C
pH: 5.5–7
Adult size: 4 in · 9 cm
Flow: Calm
Swims: Bottom
Temperament: Peaceful
Diet: Omnivore
Group: 5+
Typical price: $4–8
Rarity: Pet-store staple

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Photo: Robert Mollik, CC BY-SA 4.0

Pearl gourami

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Gouramis & bettas · Trichopodus

24–28°C
pH 6–7.5
Calm
5 in
Top/mid
Mixed
Peaceful

Long fins. Fin nippers will pick on it.

Pearl gourami

Trichopodus leerii

Peat swamps of Malaysia, Sumatra and Borneo · swamp or paddy

Temperature: 24–28°C
pH: 6–7.5
Adult size: 5 in · 12 cm
Flow: Calm
Swims: Top and mid-water
Temperament: Peaceful
Diet: Omnivore
Group: 1+
Typical price: $7–14

Long fins. Fin nippers will pick on it.

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Photo: BEDO (Thailand), CC BY-SA 4.0

Siamese algae eater

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Other fish · CrossocheilusStaple

24–26°C
pH 6.5–7
Gentle
6 in
Bottom/mid
Veg
Peaceful
3+ group

Siamese algae eater

Crossocheilus oblongus

Streams of Thailand and the Malay Peninsula · stream

Temperature: 24–26°C
pH: 6.5–7
Adult size: 6 in · 15 cm
Flow: Gentle
Swims: Bottom and mid-water
Temperament: Peaceful
Diet: Grazer
Group: 3+
Typical price: $4–8
Rarity: Pet-store staple

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Photo: User:Ark pl wiki, CC BY 3.0

Sparkling gourami

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Gouramis & bettas · TrichopsisStaple

24–28°C
pH 6–7.5
Calm
1.6 in
Top/mid
Meat
Peaceful
4+ group

Sparkling gourami

Trichopsis pumila

Rice paddies and ditches of Southeast Asia · swamp or paddy

Temperature: 24–28°C
pH: 6–7.5
Adult size: 1.6 in · 4 cm
Flow: Calm
Swims: Top and mid-water
Temperament: Peaceful
Diet: Carnivore
Group: 4+
Typical price: $4–8
Rarity: Pet-store staple

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Photo: Zikamoi, CC BY-SA 3.0

Tiger barb

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Barbs · PuntigrusStaple

21–27°C
pH 6–7.5
Gentle
2.8 in
Mid
Mixed
Semi-agg.!
6+ group!

Fin nipper. Keep it away from long-finned fish.

Tiger barb

Puntigrus tetrazona

Sumatra and Borneo · stream

Temperature: 21–27°C
pH: 6–7.5
Adult size: 2.8 in · 7 cm
Flow: Gentle
Swims: Mid-water
Temperament: Semi-aggressive
Diet: Omnivore
Group: 6+
Typical price: $3–5
Rarity: Pet-store staple

Fin nipper. Keep it away from long-finned fish.

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Photo: Ingvar-fed, CC BY-SA 3.0

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