Can a Black Goldfish Turn Orange

Can a Black Goldfish Turn Orange?

If your black goldfish is turning orange, you should find the main cause of this problem. Here are 10 real facts that explain the reasons for this color change in fish.

Can a Black Goldfish Turn Orange? Yes, a black goldfish can turn orange because of insufficient light, poor water conditions, excessive food, changes in water pH and temperature, and the presence of toxic chemicals in the tank.

This change in their color can be reversed if you fix all the causes of this issue.

Can a Black Goldfish Turn Orange?

It is a type of ornamental fish and also known as telescope fish. Its name telescope refers to its unique eyes. It has black, and its appearance is different from other fish.

Insufficient light

It requires plenty of sunlight to maintain its original color. On average, it needs about 12 hours of exposure to sunlight or artificial light.

These changes are due to this reason that happens in winters or foggy days. These days they are unable to get sufficient light.

Sometimes the water in the pond gets to freeze, and light can not reach them. This condition, when prolonged, can cause damage.

This can also happen even in a fish tank at your home when you keep it in a shady place or inside the house where sunlight can not reach.

Keeping it inside where not even any artificial light is present can aggravate the problem. The domestic fish need exposure to sunlight at least once a week. The UV rays present in it play a significant role in improving and maintaining them.

Poor Water condition

Change in pH and excess of nitrogen and ammonia in water can make the water unfit for them.

Purified water has a neutral pH, and its ammonia and nitrogen contents are at 0ppm. When we do not change the water regularly, pH and other harmful contents accumulate in the water. The type of food we are feeding to our fish is another factor in disturbing water chemistry.

When fish eat such veggies that produce harmful waste, the water becomes unfit for consumption. The accumulated waste for several days can also affect them.

The waste produces ammonia, which in turn burns the natural color of fish and they can eat the dwarf frogs if they are present in the tank.


Velvet disease is most common, which is responsible for this. It appears as a yellowish-grey speck on the skin of them.

Oodinium is a parasite that is the main culprit behind this disease. It attaches itself to the skin of by movement of flagella. After attachment, it slowly penetrates the body. This parasite starts to feed on the nutrients present in the body.

The fish can not use all of the nutrients due to this parasite. It quickly reproduces by forming a reproductive cyst. Then it releases the baby parasite in the water.

Symptoms include itching and yellow to green spots on the body. The fish try to rub its body against a hard surface. It looks lethargic due to nutritional deficiencies.

The water contains many germs and fungi that can affect the fish. Fungi grow rapidly in filthy water that is full of waste materials. They can aggravate the illness in them, once they are happy in the new tank, they will swim actively.

Hereditary conditions

Some of them have their genetic makeup different from others. They are predisposed to change the color no matter what happens.

These hereditary genes will express themselves at some stage in their life. When the fish is not ill, and other environmental conditions are right, then the genetic issue causes the change.

Temperature changes

In summer, when the temperature is extreme, the temperature of water rises.

These are sensitive to temperature. It can only survive at 72 degrees Fahrenheit temperature. When the temperature is above, it changes in color happens.

It is most evident in the ponds and rivers. Here direct sunlight falls on the skin of them. The water tanks placed at a hot place and sunny area also cause a heart attack in fish.

Age factor

They change their color as they grow in age. They usually turn yellow to orange at the age of one to two years.

They even get darker at the age of three. There is nothing to worry about; it is also a sign of maturity in them. Many fellows complain that their goldfish eat other fish.

The baby fish also change color to escape from predators. The bright colors like orange and gold are less attractive to the predators.

Frequent veggie food

They are usually omnivores scavengers. They eat anything they found in the water. When you are feeding a lot of veggies and plants to them, then color change occurs. If it is living in a mason jar, then you should calculate the size and then proceed.

A lot of plants and nutrients cause different morphological changes in them. A food high on protein is also responsible for this change. 

Sometimes the fish also improve their color from dark black to any bright color. They improve them according to the surrounding environment. It helps them to adopt it in a better way. You should feed around 5 times to baby mollies for their growth.

The pattern of color change

When they start to get orange color first, the black color fades, then it disappears from the flanks and slowly from the upper body.

Then the orange spot appears on the lower body and flanks of the fish. Then it appears on the upper body, and slowly the whole body gets orange. You can use these popular names for your fish.

How long does Goldfish take to change color?

The speed of color change depends upon various factors like temperature, genetics, and water. Different breeds of black goldfish change color at a different speed. Fish takes around 50 to 60 days to change the color.

How to reverse the color change in Goldfish?

This depends upon the contributing factor of the change. Factors like age and genetics cause a permanent change.

Other factors, like temperature and illness, cause a temporary change; it is reversible in such cases. They can quickly gain their original look by reversing the conditions.

You can quickly reverse it by preventing and treating diseases. To treat velvet disease, use copper sulfate; it can eliminate the parasite from the fish.

This medicine is used for a duration of 8 to 10 days. Quinine salts are also suitable for this purpose. Place the fish in a separate tank for 15 days to eliminate the parasite.

The parasite reproduces a new parasite, and they search for a new host. When they can not find any host, they die within 14 days.

Another option is to change the water regularly. When it is due to water’s bad chemistry, you can reverse it using fresh and purified water.

Change the water at least once weekly. You should also clean the tank to remove all the toxins and waste from it. 

Place the tank in a well-lit area. You can also manage to lit it up by using an artificial light bulb. Place the tank in sunlight once weekly.

Maintain the temperature of water by keeping it away from the heat source like a heater or oven. When the temperature is above the line, place it in dim light to decrease it. You can use carbon filters to reduce the exposure to the light.