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.

EndangeredRarePopularPeaceful✓ Small (6 cm or less)Calm waterStrong flowSchoolingL-numbersWith photo Basic profiles too
Showing: Rarity: Common ✕

Common 4 fish

Dwarf neon rainbowfish

Dwarf neon rainbowfish ≈

Rainbowfish · Melanotaenia

  • 24–28°C
  • pH 6.5–7.5
  • Gentle
  • 2.4 in
  • Mid/top
  • Mixed
  • Peaceful
  • 6+ group!
Mamberamo River basin, New Guinea

Dwarf neon rainbowfish

Melanotaenia praecox

Mamberamo River basin, New Guinea · stream

Temperature
24–28°C
pH
6.5–7.5
Adult size
2.4 in · 6 cm
Flow
Gentle
Swims
Mid-water and top
Temperament
Peaceful
Diet
Omnivore
Group
6+
Typical price
$6–12
View full profile

Photo: Raimond Spekking, CC BY-SA 4.0

German blue ram

German blue ram ≈

Cichlids · Mikrogeophagus

  • 27–30°C!
  • pH 5–7
  • Calm
  • 2.4 in
  • Bottom/mid
  • Mixed
  • Peaceful
  • 2+ group
Llanos savanna streams, Orinoco basin

German blue ram

Mikrogeophagus ramirezi

Llanos savanna streams, Orinoco basin · stream

Temperature
27–30°C
pH
5–7
Adult size
2.4 in · 6 cm
Flow
Calm
Swims
Bottom and mid-water
Temperament
Peaceful
Diet
Omnivore
Group
2+
Typical price
$12–25
View full profile

Photo: Eric Mengel, Public domain

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

Pea puffer

Pea puffer ≈

Other fish · Carinotetraodon

  • 24–28°C
  • pH 7–8
  • Calm
  • 1 in
  • Mid
  • Meat
  • Aggressive!

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

Rivers of Kerala, southwest India

Pea puffer

Carinotetraodon travancoricus

Rivers of Kerala, southwest India · river

Temperature
24–28°C
pH
7–8
Adult size
1 in · 2.5 cm
Flow
Calm
Swims
Mid-water
Temperament
Aggressive
Diet
Carnivore
Group
1+
Typical price
$6–12

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

View full profile

Photo: 5snake5, CC0

Showing 4 of 4