WHAT THE FACT?
If you keep a goldfish in the dark room, it will eventually turn white.
Goldfish produces melanin. Melanin is a pigment body's product that is activated by the suns light. Without light the pigment fades. It is in rare occasions that the goldfish will actually turn white. And it isn't fully advisable to try this because light is a key need in the long life of a goldfish.
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