Koi - in The Wild

In The Wild

See also: Common carp

Koi have been accidentally or deliberately released into the wild in every continent except Antarctica. They quickly revert to the natural coloration of common carp within a few generations. In many areas, they are considered an invasive species and pests. They greatly increase the turbidity of the water because they are constantly stirring up the substrate. This makes waterways unattractive, reduces the abundance of aquatic plants, and can render the water unsuitable for swimming or drinking, even by livestock. In some countries, koi have caused so much damage to waterways that vast amounts of money and effort have been spent trying to eradicate them, largely unsuccessfully.

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Famous quotes containing the word wild:

    To see a world in a grain of sand
    And a heaven in a wild flower,
    Hold infinity in the palm of your hand
    And eternity in an hour.
    William Blake (1757–1827)