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Amrican Flag Fish

Updated on April 16, 2011


  • Size: 2 1/2 in (6cm)
  • Temperature: 66-72 degrees F
  • Minimum tank size: 10 galons
  • Care Level: Easy-Intermidiate
  • Origin: Florida swamps, or tank-raised
  • Semi-Agressive, Territorial, timid and shy.


Tank Set-up: These fish enjoy densely planted tanks, with an open space of swimming in the middle. Use a darker subtrate to show off color, with smaller gravel. Choose 'hardy' plants with broad leaves, flag fish will destroy thin-leaved plants completely. Use Driftwood pieces to give the aquarium a natural swamp-like look, and provide hiding places. In warm-climate areas they can even live in ponds if they are in schools.


Tank-mates: Theese fish can sometimes be timid and shy, and to show off their true colors they need to be placed with other peaceful fish that wont bully them. They can live with most fish in proper environments and big enough tanks. Males can sometimes be territorial and aggressive, so in smaller tanks they are best kept alone. Keep a ratio of 1 male for every 3 females. American Flag fish like to be together. The best tank mates other than their own kind are livebearers and corydoras.


Feeding: These fish are heavy eaters, and will eat as much as they can, so it is better to keep them 'full'. They are great at eating algae of all types, especially hair algae. If there is no algae, they must have vegtables in their diet such as spinach or lettuce. They ahould also be fed flake food regularly. To encourage healthy algae growth for them, keep them near a window, and sunlight.


Breeding: American Flag fish are easy to breed. The male starts to first build a depression in the subtrate, and line it with debris. Over several days the female will lay about 20 eggs a day in the depression. The male then guards the eggs until they hatch. When the fry hatch they must be fed infusoria and other types of small food. In a few weeks transfer them into a smaller tank with heavy algae growth- to ensure better survival chances.



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    • FishAreFriends profile image

      FishAreFriends 5 years ago from Colorado

      They'll probably survive, but they wont be happy.

    • profile image

      Harry 5 years ago

      ive just got one off my mate will it survive in a 27 degrees tank ?

    • FishAreFriends profile image

      FishAreFriends 6 years ago from Colorado

      I hope you do set it up! Theese are my favorite fish species. Thank you so much!

    • Jlbowden profile image

      James Bowden 6 years ago from Long Island, New York


      I enjoyed your Hub about the Flag Fish. I used to have a 20 gallon aquarium and after reading your article, I am now tempted to set it up again. Thanks for sharing this useful information-it's a truly beautiful one as well!