A goldfish left in the dark would gradually, over time, turn completely white. This is because the color pigmentation cells responsible for the fish's bright color, cannot work without sunlight. It would, however, take a very long time for a goldfish to lose 100% of its color because they have so many color pigmentation cells in their scales.
Yes!
It would die
it would die
It will turn white, or at least will start having some loss of color.
If you just have methane in a dark room nothing will happen because nothing is there to react. If the room was light nothing would happen either, as there are still no other chemicals for it to react with.
If a goldfish is kept in the dark it will appear lighter in the morning, So if left in the dark for a long period of time, a goldfish will turn almost white. If kept in the light, it will absorb color, and often become a brighter gold. (almost the same as when we tan, the sun gives us color, and when we get less of it we turn whiter, or lighter)
It won't grow much but it will try to find the light.
Yes. A COMMON goldfish is extremely endangered. At most 2,000 left!
we would have no food left :)
there would only be 10 left unless they mate
he would kill himself
It would shrink. (>'-')>