Q. Do goldfish need light?
A. Yes, goldfish do need light.
Do goldfish need light?!
Well..how would you like to be kept in the dark?!
Goldfish definitely do need light.
Like most animals, goldfish would not be healthy if permanently kept in dull or dark conditions.
However, you should not keep your goldfish in direct sunlight (as the water may get too hot) and you don’t necessarily need to add an aquarium light.
The only reasons to add a light to your aquarium would be to grow plants or if your goldfish are in a particularly poorly lit area.
If you do add a light to your aquarium then switch it off at night.
Like humans, goldfish prefer to “sleep” in the dark.