Tips on Owning Mexican Walking Fish

In the world of aquarium fish, axolotls or "Mexican walking fish" rank among the more peculiar in appearance. They are salamander larvae with large, feathery external gills, underdeveloped limbs, and a caudal fin which runs from their heads to their vents. Mexican walking fish will require a bit more work than your average goldfish or guppy; they average 23 centimeters (about 9 inches) in length and have particular dietary requirements. They're also known for their aggressive nature.

  1. Habitat Tips

    • Mexican walking fish are not meant for small fish bowls. At a minimum you should use a 20 gallon tank, and the bigger the better, especially if multiple fish are present. Your tank should be exposed to medium light; complete darkness or exposure to direct sunlight can be harmful. The fish will require areas of refuge in the tank, which can be provided by driftwood or plastic "caves." Large stones should be used to carpet the tank as opposed to smaller gravel that fish can swallow when they feed at the bottom of the tank. Recommended water temperatures are 14 to 20 degrees Celsius (57 to 68 degrees Fahrenheit).

    Feeding Tips

    • In their natural environments in Mexico City, Mexican walking fish feed on insects, small fish and crustaceans. As pets you can feed them live bloodworms, earth worms, feeder guppies, mosquitos, beef heart, beef liver, trout or salmon pellets. They should be fed every two to three nights; don't feed them more than this as their digestive systems are slow. If you feed them earthworms be aware of pesticides.

    Tank Mates

    • Mexican walking fish will eat smaller fish in confined spaces; however, they can live in harmony with members of their own species in larger tanks as long as you feed them regularly. Failure to do so may result in aggressive behavior.

    Handling Tips

    • Handling Mexican walking fish should be kept to an absolute minimum as they are a fragile species. Some contain a poison that can irritate human skin and especially your eyes, so be sure to wash your hands thoroughly if you do decide to handle them.

    Keep In Water

    • Yes, they are salamanders, and yes, they are commonly referred to as "walking" fish, but axolotls should never be placed on land. Their limbs are not developed for land and they will not be able to breathe. Keep in mind that cats and other animals can pull the fish from the tank if you leave the tank in a place that's accessible.