American Flagfish (Jordanella floridae)

American Flagfish (Jordanella floridae)


  • Family: Cyprinodontidae
  • Origin: Florida, Tank-Raised
  • Max. Size: 2½”
  • Color Form: Blue, Green, Red
  • Diet: Omnivore
  • Minimum Tank Size: 10 gallons
  • Care Level: Easy
  • Temperament: Semi-aggressive
  • Water Conditions: 66-72° F, KH 6-20, pH 6.7-8.2


The American Flagfish is an undemanding Killifish that is highly sought after for its algae-managing services. If that is not reason enough to acquire this hardy and interesting New World Killifish, the unique marking and color pattern is sure to win you over. It is not difficult to see why this Killifish is named after the American flag. Alternating horizontal stripes of red and creamy green stretch across the body and iridescent scales sparkle like stars on the blue anterior of the American Flagfish. This wonderful piscine Star-Spangled Banner is sure to capture the imagination of hobbyists and onlookers alike.

The American Flagfish fish originates from still and slow-moving marshes, swamps, lakes, and ponds from Florida south to the Yucatan Peninsula. Provided with proper water quality, the American Flagfish can adapt to a variety of water conditions. The American Flagfish is a great addition to community aquariums, planted aquariums, cool-water aquariums, or even small outdoor ponds. The ideal aquarium environment for the American Flagfish should include driftwood, roots, and rocks for ample hiding places. Dense planting along the sides and rear of the aquarium and finish with a cover of floating plants. Be sure to leave an open swimming area in the center of the aquarium. To help bring out the best coloration in the American Flagfish, consider using dark substrate. The female American Flagfish is larger, more full bodied, and tends to be more yellow in coloration than the male. The dorsal fin of the male American Flagfish will tend to be more ornate and the body is more olive-green in coloration.

The American Flagfish will accept most live foods such as brine shrimp, white worms, tubifex, and some commercially prepared flake and frozen foods. If sufficient algae is not present in the aquarium, supplement the diet of the American Flagfish with prepared algae flake food or algae tablets.

Approximate Purchase Size: 3/4″ – 1-1/4″


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