I have a common goldfish who i had about a month now.
its only about 2 inch long and always had black fins .
But he seems to now have this black over his face.
Its worrying me cause its a different shade of black to the gills its a bit like bruising
any ideas?

Hi nicolle,

Can you give us a bit more info about your tank and water quality? The box on top of the forum has some standard questions that can be used as a guideline. If you don't know the answer, just say don't know.

Sometimes, black marks on fish are caused by water quality problems such as an ammonia spike. The black marks are actually signs of healing but it also means that your tank is unstable. It is best to get your water tested to see what your water quality is and then we can pinpoint the source of your worries.

Post back soon with more info.

yes, we definately need to know the levels of ammonia, nitrate, nitrite, and ph in your water in order to help figure out what is wrong here.