American flagfish (Jordanella floridae)

Family: Cyprinodontidae

American flagfish — a Cyprinodontidae from 中北美洲, peaceful, hardy and constantly reproducing. Reaches 4.9–7.2 cm; one male to two or three females spreads the attention. 18–22 °C.

Care parameters

Water temperature
18–22 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
4.9–7.2 cm
Minimum tank
62 L
Water layer
Middle of the water column
Difficulty
Moderate
Temperament
Peaceful, hardy and constantly reproducing
Origin
中北美洲

Species overview

Jordanella floridae, a member of the family Cyprinodontidae, is native to 中北美洲. An unkillable beginner classic that nonetheless shows its best in hard, alkaline, well-planted water. It swims in mid-water. Adults reach 4.9–7.2 cm. One male to two or three females spreads the attention. Keep water hard and alkaline, plant densely, and expect fry — forever. Maintain 18–22 °C at pH 6.5–7.5. A rewarding species for the aquarist who reads before buying.

Native biotope

Habitat
Warm freshwater streams and lakes
Flow
Still to gentle current
Dissolved O₂
Moderate oxygen levels

Aquascape & hardware

Substrate
Fine sand and gravel
Hardscape
Driftwood and smooth stones
Plants
Hardy common aquarium plants

Temperament, diet & tankmates

Schooling
One male to two or three females spreads the attention
Diet
Omnivorous surface-picker; varied diet keeps colour bright
Recommended tankmates
  • Corydoras catfish — Share the bottom peacefully
Avoid keeping with
  • Large predators — The fry buffet ends everything

Breeding & notes

Sexual dimorphism
Subtle external differences
Breeding method
Gives birth to free-swimming fry; dense plants raise survival