American Flagfish

• ExerciseModerate

  An active swimmer that appreciates open swimming space.

• GroomingRoutine tank care

  Weekly partial water changes keep them in top shape.

• Living spaceNano-tank friendly

  Happy in a small, stable, well-filtered tank.

• Owner experienceSome experience helps

  A little know-how makes life smoother.

• Commitment2–4 years

  Plan for a long, loving relationship.

Health to watch: Ich (white spot) · Fin rot · Skin conditions

The American Flagfish (Jordanella floridae) is native to Florida and parts of the southeastern United States, living in weedy ponds, marshes and canals, and reaches about 5 to 6 cm. Males are stockier and boldly patterned in red and iridescent green; females are plainer with a dark spot on the flank. It is a pupfish rather than a typical tropical killifish. Keep a small group with more females than males in a planted tank of 75 litres or more at 18-26C with a pH of 6.5 to 8.0, tolerating a wide range of hardness. It handles cooler water well and does not require a heater in a room-temperature home. Feed a diet with a strong vegetable component, spirulina flake, blanched vegetables and algae wafers, alongside frozen daphnia and bloodworm. Its main practical use is as one of the few reliable eaters of hair and thread algae. Be honest about temperament: males are territorial and may nip long-finned tankmates, so choose robust companions.

• How active is a American Flagfish?

  Moderate. An active swimmer that appreciates open swimming space.

• How much maintenance does a American Flagfish need?

  Routine tank care. Weekly partial water changes keep them in top shape.

• What tank size does a American Flagfish need?

  Nano-tank friendly. Happy in a small, stable, well-filtered tank.

• Is a American Flagfish a good fit for first-time owners?

  Some experience helps. A little know-how makes life smoother.

• How long do American Flagfish live?

  2–4 years. Plan for a long, loving relationship.

• What health issues affect the American Flagfish?

  Keep an eye out for Ich (white spot), Fin rot, Skin conditions. These are worth raising with your vet, along with any screening they recommend.

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