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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.

EndangeredRarePopularPeacefulSmall (6 cm or less)Calm waterStrong flowSchoolingL-numbersWith photo Basic profiles too
Showing: River & region: Rio Negro ✕

Rio Negro 5 fish

Starlight bristlenose

L183
Starlight bristlenose ≈

Plecos · AncistrusUncommon

  • 23–28°C
  • pH 5.5–7.5
  • Gentle
  • 6 in
  • Bottom
  • Mixed
  • Peaceful

Black with white stars and white fin edges.

Rio Negro, Brazil

Starlight bristlenose

L183

Ancistrus dolichopterus

Rio Negro, Brazil · river

Temperature
23–28°C
pH
5.5–7.5
Adult size
6 in · 15 cm
Flow
Gentle
Swims
Bottom
Temperament
Peaceful
Diet
Omnivore
Breeding
Easy–moderate
Typical price
$25–80
In Canada
Occasional
Rarity
Uncommon

Black with white stars and white fin edges. The prettiest bristlenose, but it prefers cooler, soft water.

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Photo: Alberto Mejia-Paniagua, CC BY NC SA

Cardinal tetra

Cardinal tetra ≈

Tetras · ParacheirodonStaple

  • 23–29°C
  • pH 4.5–7
  • Calm
  • 1.6 in
  • Mid
  • Mixed
  • Peaceful
  • 6+ group!
Rio Negro and upper Orinoco, Brazil and Venezuela

Cardinal tetra

Paracheirodon axelrodi

Rio Negro and upper Orinoco, Brazil and Venezuela · blackwater stream

Temperature
23–29°C
pH
4.5–7
Adult size
1.6 in · 4 cm
Flow
Calm
Swims
Mid-water
Temperament
Peaceful
Diet
Omnivore
Group
6+
Typical price
$3–7
Rarity
Pet-store staple
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Photo: Paolo Neo, Public domain

Rummynose tetra

Rummynose tetra ≈

Tetras · HemigrammusStaple

  • 24–28°C
  • pH 5.5–7
  • Gentle
  • 2 in
  • Mid
  • Mixed
  • Peaceful
  • 8+ group!
Lower Amazon and Rio Negro, Brazil

Rummynose tetra

Hemigrammus rhodostomus

Lower Amazon and Rio Negro, Brazil · blackwater stream

Temperature
24–28°C
pH
5.5–7
Adult size
2 in · 5 cm
Flow
Gentle
Swims
Mid-water
Temperament
Peaceful
Diet
Omnivore
Group
8+
Typical price
$3–6
Rarity
Pet-store staple
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Photo: Gavinevans, CC BY-SA 3.0

Snowball

L102
Give us a picture and get credit! ≈

Plecos · HypancistrusUncommon

  • 26–29°C
  • pH 5.5–7.5
  • Strong!
  • 6 in
  • Bottom
  • Meat
  • Peaceful

Bigger, sparser white spots than L201, and a bigger fish overall.

Upper Rio Negro and Casiquiare, Venezuela and Brazil

Snowball

L102

Hypancistrus inspector

Upper Rio Negro and Casiquiare, Venezuela and Brazil · rapids

Temperature
26–29°C
pH
5.5–7.5
Adult size
6 in · 15 cm
Flow
Strong
Swims
Bottom
Temperament
Peaceful
Diet
Carnivore
Breeding
Easy
Typical price
$40–80
In Canada
Occasional
Rarity
Uncommon

Bigger, sparser white spots than L201, and a bigger fish overall.

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Angelicus

L136
Give us a picture and get credit! ≈

Plecos · HypancistrusUncommon

  • 26–30°C
  • pH 5.5–7.5
  • Strong!
  • 5 in
  • Bottom
  • Meat
  • Peaceful

Sold as L136a, b and c.

Middle Rio Negro, Brazil

Angelicus

L136

Middle Rio Negro, Brazil · rapids

Temperature
26–30°C
pH
5.5–7.5
Adult size
5 in · 12 cm
Flow
Strong
Swims
Bottom
Temperament
Peaceful
Diet
Carnivore
Breeding
Easy–moderate
Typical price
$40–120
In Canada
Occasional
Rarity
Uncommon

Sold as L136a, b and c. Keep one variant per breeding pair so fry stay true.

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Showing 5 of 5