Save the Little Fish

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

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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.

EndangeredRare✓ PopularPeacefulSmall (6 cm or less)Calm waterStrong flowSchoolingL-numbers✓ With photo Basic profiles too
Showing: Home water: Brackish estuary ✕

Brackish estuary 2 fish

Molly

Molly ≈

Livebearers · PoeciliaStaple

  • 22–28°C
  • pH 7.5–8.5!
  • Calm
  • 3 in
  • Mid/top
  • Mixed
  • Peaceful
  • 3+ group
Coastal rivers, Mexico to Colombia

Molly

Poecilia sphenops

Coastal rivers, Mexico to Colombia · brackish estuary

Temperature
22–28°C
pH
7.5–8.5
Adult size
3 in · 8 cm
Flow
Calm
Swims
Mid-water and top
Temperament
Peaceful
Diet
Omnivore
Group
3+
Typical price
$3–7
Rarity
Pet-store staple
View full profile

Photo: Dnoerholm, CC BY-SA 4.0

Nerite snail

Nerite snail ≈

Shrimp & snails · NeritinaStaple

  • 22–28°C
  • pH 7–8.5
  • Gentle
  • 1 in
  • Bottom
  • Veg
  • Peaceful

Invertebrate. Many fish will eat it, so choose tank mates with care.

East African coastal rivers and estuaries

Nerite snail

Neritina natalensis

East African coastal rivers and estuaries · brackish estuary

Temperature
22–28°C
pH
7–8.5
Adult size
1 in · 2.5 cm
Flow
Gentle
Swims
Bottom
Temperament
Peaceful
Diet
Grazer
Group
1+
Typical price
$3–6
Rarity
Pet-store staple

Invertebrate. Many fish will eat it, so choose tank mates with care.

View full profile

Photo: Evan Baldonado, CC BY 4.0

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