Flagfish Killifish (Jordanella floridae) - Live Fish

Flagfish Killifish (Jordanella floridae)

Colorful, hardy, and a natural algae-control superstar!

The Flagfish Killifish is a vibrant North American native with striking patterns that resemble the U.S. flag — hence the name! Males display bold red stripes and iridescent green-blue scales, while females are more subtly patterned but equally attractive. Hardy and adaptable, this species is perfect for planted tanks and is famous for its algae-eating abilities.

🔍 Quick Facts

• Scientific Name: Jordanella floridae

• Common Names: American Flagfish, Florida Flagfish

• Origin: Florida, USA

• Size: Up to 2.5" (6 cm)

• Temperament: Semi-aggressive (especially males during breeding)

• Lifespan: 3–5 years

• Care Level: Easy

🏡 Ideal Aquarium Setup

• Minimum Tank Size: 15–20 gallons

• Temperature: 64–82°F (18–28°C) — tolerant of cooler water

• pH Range: 6.5–8.0

• Water Hardness: Moderate to hard

• Tank Setup Tips:

  • Planted tank with plenty of hiding spots

  • Gentle to moderate water flow

  • Keep 1 male with several females to reduce aggression

  • Can be kept in unheated tanks in mild climates

🍽️ Diet

Omnivorous with a strong taste for plant matter and algae:

• High-quality flake or pellet food

• Vegetables (blanched zucchini, spinach, peas)

• Live/frozen foods: brine shrimp, bloodworms, daphnia

🐣 Breeding

• Egg scatterer — males create and guard territories

• Eggs hatch in about 5–7 days

• Fry feed on infusoria, then baby brine shrimp

🌟 Fun Facts

• Named for its male coloration, which resembles the stars and stripes of the American flag

• Excellent natural algae controller — often used in planted aquariums to combat hair algae

• One of the few killifish species native to North America

💧 Add a splash of patriotic color and algae-fighting power to your aquarium with the hardy, beautiful Flagfish Killifish!