Oscar wrote:
We got an aquarium 6 month ago which is populated by 8 goldfish. My wife
noticed yesterday that one of the fish, normally a golden brassy colour has
developed 2 larger dark/black spots on the top. He seems to be happy enough
otherwise, but my wife is worried it is some kind of disease.

The water is changed regularly, we test Ph and the aquarium is clean - so it
looks like a healthy environment to me.

Any advice or opinion?

Cheers, Oscar


If it seems healthy, its probably maturing, and his colors will change.
thats what happened to my fish, the black goes down the top to the tail.
Mine went from a brassy to a beautiful light orange.

Kay