Why does your fish's fins turn black?

Answer 1

Goldfish do change colour as they get older and also due to enviromental reasons.

Good quality food, good lighting and good water quality mean nice brightly coloured fish. Black is a normal colour for a goldfish.

The opposite leads to them fading or loosing colour.

My fish used to have black flecks, dad neglected him when I moved away and he lost all his colour and was a pale orange. Now I have him he's nice and healthy, turning bright orange again and gaining his black flecks back :)

If your fish is sick he will probably be at the bottom of the tank alot with his fins clamped to his sides and will generally look dull. :)

Answer 2

The common goldfish can change color many times throughout its life cycle.

Answer 3

If it is young it is probably getting it's colors. But otherwise it must be sick then.

Answer 4

Sometimes fish get scabs, which is the black you are seeing, from ammonia or nitrites. You have to balance the pH of the tank before putting your fish into it.

Answer 5

My goldfish was pure orange but now it has a black thing at the back...

Answer 6

Black Fin is a disease that causes the affected goldfish's fins to decay. It is commonly caused by high ammonia levels, so test your water and do a 75% water change if needed.

Answer 7

ur fish turned racist to white fishies

Answer 8

cause their old