Save the Little Fish

Freshwater fishes

The fish list

542 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.

The fishes 168 fish · new every day

Midas cichlid

Midas cichlid ≈

Cichlids · AmphilophusLC

Predator. Eats any fish that fits in its mouth.

Lakes and San Juan drainage of Nicaragua and Costa Rica

Midas cichlid

Amphilophus citrinellus

Lakes and San Juan drainage of Nicaragua and Costa Rica · lake

Temperature
21–26°C
pH
6–8
Adult size
14 in · 35 cm
Flow
Calm
Swims
Bottom
Temperament
Aggressive
Diet
Omnivore
Group
1+
Status in the wild
Least concern

Predator. Eats any fish that fits in its mouth.

Photo: George Chernilevsky, CC BY-SA 4.0

Agassiz's dwarf cichlid

Agassiz's dwarf cichlid ≈

Cichlids · ApistogrammaLC

Leaf-litter creeks and backwaters of the Amazon basin, Peru to Brazil

Agassiz's dwarf cichlid

Apistogramma agassizii

Leaf-litter creeks and backwaters of the Amazon basin, Peru to Brazil · stream

Temperature
22–29°C
pH
5–7
Adult size
3 in · 7.5 cm
Flow
Calm
Swims
Bottom
Temperament
Peaceful
Diet
Carnivore
Group
3+
Status in the wild
Least concern

Photo: Cisamarc, CC BY-SA 3.0

Fairy cichlid

Fairy cichlid ≈

Cichlids · NeolamprologusLC

Hard water. Needs hard, alkaline water, like its rift lake.

Northern Lake Tanganyika: rocky shores of Burundi, Tanzania, DR Congo, 5-25 m

Fairy cichlid

Neolamprologus brichardi

Northern Lake Tanganyika: rocky shores of Burundi, Tanzania, DR Congo, 5-25 m · lake

Temperature
23–26°C
pH
8–9
Adult size
4 in · 9 cm
Flow
Gentle
Swims
Mid-water
Temperament
Territorial
Diet
Carnivore
Group
2+
Status in the wild
Least concern

Hard water. Needs hard, alkaline water, like its rift lake.

Photo: FakirNL, CC BY-SA 4.0

Sultan

L264
Sultan ≈

Plecos · LeporacanthicusRare

White spots and white-tipped fins on black.

Rio Tapajós, Brazil

Sultan

L264

Leporacanthicus joselimai

Rio Tapajós, Brazil · rapids

Temperature
26–30°C
pH
5.5–7.5
Adult size
8 in · 20 cm
Flow
Strong
Swims
Bottom
Temperament
Territorial
Diet
Carnivore
Breeding
Hard
Typical price
$60–150
In Canada
Occasional
Rarity
Rare or hard to breed

White spots and white-tipped fins on black. Grows to about 20 cm and holds a cave firmly.

Photo: Thomas Siems, CC BY-SA 2.0

Scarlet cactus

L025
Scarlet cactus ≈

Plecos · PseudacanthicusRare

Rio Xingu, Brazil

Scarlet cactus

L025

Pseudacanthicus pirarara

Rio Xingu, Brazil · rapids

Temperature
26–30°C
pH
5.5–7.5
Adult size
24 in · 60 cm
Flow
Strong
Swims
Bottom
Temperament
Aggressive
Diet
Carnivore
Breeding
Rarely
Typical price
$400–1000
In Canada
Rare
Rarity
Rare or hard to breed

Grey with scarlet fins. Can pass 60 cm, so it needs a tank of its own.

Photo: JSutton93, CC BY SA

Nerite snail

Nerite snail ≈

Shrimp & snails · NeritinaStaple

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.

Photo: Evan Baldonado, CC BY 4.0

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