Hi everyone, I noticed on my white goldfish a round dark area. I immediately thought it was a parasite or some disease brought in by a new fish.

Fortunately I went to a fish store where the owner knows his stuff and he said that it's most likely a bruise from the way fish chase around, so not to put any medicines in the pond.

He was right because the spot is fading. He said that the main clue that a fish has troubles is if they aren't eating or are acting lethargic. This fish was always acting fine with lots of spunk and had a good appetite.

So moral of the story is: talk to someone that knows, not someone that's just going to try to sell you something.

Victoria