Gold gourami color?

Question

My Gold Gourami changes into a darker shade of brown. Is this common?

Answer 1

It does happen  a lot when they are sick or stress. So its a bit  common but not healthy so you should try to find out why he is stressed out.

Answer 2

This is usually a sign of stress, especially if it is temporary (check your water parameters, as poor water quality is a common cause of stress).  If it is constantly darkened, it is not a good sign, possibly indicating Iridovirus or other infections.  Just watch it carefully to make sure it doesn't progress.