American Flagfish
Also known as: Jordanella floridae
The American Flagfish (Jordanella floridae) is a small, hardy killifish native to southeastern United States freshwater habitats. The American Flagfish originates from Native to Florida, USA, inhabiting slow-moving freshwater ponds, ditches, and marshes with dense vegetation., reaches 6 cm in captivity, typically lives 3, and is kept at 22C (72F). Individual fish vary, so treat this as a general guide rather than a guarantee.
Species at a glance
- Origin
- Native to Florida, USA, inhabiting slow-moving freshwater ponds, ditches, and marshes with dense vegetation.
- Adult size
- 6 cm (2.4 in)
- Life span
- 3
- Temperament
- Peaceful but can be mildly territorial, especially males during breeding; best kept in species-only tanks or with similarly sized, non-aggressive community fish.
- Tank size
- 38 L (10 gal)
- Water temp
- 22C (72F)
- pH range
- pH 6.5-8.0
- Diet
- Omnivorous; feeds on algae, detritus, small invertebrates, and plant matter in the wild; in captivity, accepts high-quality flakes, pellets, blanched vegetables (zucchini, spinach), and occasional live or frozen foods like brine shrimp and daphnia.
- Other names
- Jordanella floridae
About the American Flagfish
The American Flagfish (Jordanella floridae) is a small, hardy killifish native to southeastern United States freshwater habitats. Males display striking iridescent blue-green bodies with red and yellow horizontal stripes resembling the American flag, while females are duller with subdued markings. They are known for their algae-grazing behavior and are often used in planted tanks to help control soft algae growth. Despite their small size, they are active and exhibit interesting social behaviors, particularly during breeding when males establish small territories.
Lifespan and health
With proper care, American Flagfish typically live 2-3 years in captivity, though exceptional individuals may reach up to 4 years under ideal conditions; longevity is heavily influenced by water quality, diet consistency, and stress levels, with males often having slightly shorter lifespans due to the energetic demands of territorial displays and breeding behavior. Common health issues include bacterial infections (such as fin rot) from poor water quality, parasitic infestations like ich (white spot disease) if new fish are not quarantined, and nutritional deficiencies leading to faded coloration or lethargy—preventable through regular water testing (ammonia and nitrite at 0 ppm, nitrate below 20 ppm), stable temperatures between 22-26°C (72-79°F), and a diet rich in vegetable matter and protein.
Overview
The American Flagfish (Jordanella floridae) is a small, hardy killifish native to southeastern United States freshwater habitats. Males display striking iridescent blue-green bodies with red and yellow horizontal stripes resembling the American flag, while females are duller with subdued markings. They are known for their algae-grazing behavior and are often used in planted tanks to help control soft algae growth. Despite their small size, they are active and exhibit interesting social behaviors, particularly during breeding when males establish small territories.
Care and tank setup
For optimal care, maintain a minimum tank size of 38 liters (10 gallons) for a small group of 3-5 individuals, though larger tanks (75+ liters / 20+ gallons) are recommended to reduce male aggression and provide ample swimming space. Use a sandy or fine gravel substrate with dense planting (e.g., Java moss, hornwort, Vallisneria) and driftwood to mimic their natural habitat and provide hiding spots; filtration should be gentle to avoid strong currents, and weekly 25% water changes are essential to maintain water quality. Feed a varied diet 2-3 times daily, offering only what they can consume in 2-3 minutes to prevent overfeeding; supplement staple flakes or pellets with blanched vegetables 2-3 times per week and live/frozen foods once weekly to enhance coloration and health. Suitable tankmates include peaceful, similarly sized species such as ember tetras, pygmy corydoras, or otocinclus catfish; avoid fin-nippers or large, aggressive fish that may stress or prey on them.
Related breeds
Breed information on this page is based on the Wikipedia article on the American Flagfish, supplemented with additional research. Reviewed for accuracy.