Save the Little Fish

Saving the world’s tropical fish, one tank at a time.

Sign in

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 water✓ Strong flowSchoolingL-numbersWith photo Basic profiles too
Showing: Rarity: Common ✕

Common 2 fish

Butterfly hillstream loach

Butterfly hillstream loach ≈

Loaches · Beaufortia

  • 20–24°C!
  • pH 6.5–7.5
  • Strong!
  • 3 in
  • Bottom
  • Veg
  • Peaceful
  • 3+ group
Fast rocky streams of southern China

Butterfly hillstream loach

Beaufortia kweichowensis

Fast rocky streams of southern China · rapids

Temperature
20–24°C
pH
6.5–7.5
Adult size
3 in · 8 cm
Flow
Strong
Swims
Bottom
Temperament
Peaceful
Diet
Grazer
Group
3+
Typical price
$10–18
View full profile

Photo: Lerdsuwa, CC BY-SA 3.0

Hillstream loach

Hillstream loach ≈

Loaches · Sewellia

  • 20–24°C!
  • pH 6.5–7.5
  • Strong!
  • 2.4 in
  • Bottom
  • Veg
  • Peaceful
  • 3+ group
Fast mountain streams of central Vietnam

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
View full profile

Photo: 5snake5, CC0

Showing 2 of 2