How Big Can A Black Moor Grow?

Goldfish are generally seen to be one of the most famous ornamental fishes, and the black moor is one of the classic variants of this group. Black Moor, otherwise known as telescope eyes, are famous for their protruding eyes, bold colouration, and overall exciting anatomy.

Black Moor usually grows up to 6-8 inches in length, and some can even grow larger if all conditions are favourable. How big they can develop can be influenced by many factors, including genetics, feeding, water parameters, and other environmental conditions.

How Big Can A Black Moor Grow

Black Moor is a variant of goldfish that can grow well and healthy if adequately fed. Likewise, water parameters and general environmental conditions can affect how well they grow.

Black Moor is neither too big nor too small, and their velvety black coloration often characterizes them. Likewise, their scales appear to glisten in water to complement their fancy outlook. It is easy to keep black moor healthy and maintain their proper growth if your tank is clean, and they are fed a proper diet.

General Anatomy And Appearance Of Black Moor

Two classic things about black moor is that their name “black moor” is from their black color, and their nickname “telescope eyes” is from their protruding eyes. Most black moors have velvety or robust black coloration with just a few orange patches across their body.

The eyes of the black moor are the most prominent part of their body at first glance. They have protruding eyes that gradually pop out of their head with age. One would naturally think their big eyes will give them a better sight. It is, however, ironic. Despite how big their eye lenses are, they still have poor eyesight.

The same thing applies to their long fins. Black Moor has long fins that one would ordinarily think will aid their swimming, but ironically, their movement is slower as a result of the long fins. These long fins and poor eyesight make black moor easy prey both in the wild and in community tanks.

Other Features Of Black Moor

Another exclusive feature of the black moor is its round body that takes an overall egg-like shape. This shape also contributes to the reason why they are slow swimmers. They have a relatively large dorsal and pectoral fin and anal and tail fins that are long and flowing.

Another essential anatomy of the black moor to note is their sexing. Identifying the sexes of black moor can be quite confusing, especially for beginners.  In terms of size, females are slightly smaller than the male, but it is not enough features to distinguish them.

The best and easiest way to identify the sex of the black moor is to wait until the spawning season. Spawning season is typically between April and August. During this period, males and females will have distinguishable features.

The most noticeable feature during this period is the white bump, generally called breeding tubercles that appear in pectoral fins of females during breeding. In general, both males and females have an average size of 6-8 inches, and they can even grow more prominent if they are kept under ideal conditions.

What Size Aquarium Do Black Moor Need

Even though the black moor is no very strict in their environmental demand, they still like to enjoy their space. If you don’t want your black moor to get stressed, you must make sure they have enough space that can accommodate their long fins.

The size of your black moor can vary depending on the number of fishes you are keeping there, but they require a particular water standard. On average, one black moor should be provided with at least 20 gallons of water each. At this specific water level, you can be sure of the water standard of your tank.

Black Moor Tank Set-Up

It is challenging to consider and simulate the natural habitat of a black moor when setting up your black moor aquarium. They can be found in many diverse water bodies such as reservoirs, lakes, caners, and rivers. However, one common thing about these river bodies is that they are slow-moving water with sand or dirt lining bottom.

Black Moor prefers water with relatively neutral pH, but they can still cope with a broader temperature range. In general, your primary aim while setting up a tank for the black moor is to create a friendly environment where they can be healthy and happy.

The pH of the black moor aquarium should be almost neutral and should be kept within the range of 6.5-7.5. They can still tolerate a more extensive temperature range between 50-75°F. Therefore, it is not compulsory to install a heater in their tanks. Alternatively, you can place the tanks under direct sunlight.

Similarly, you don’t need additional equipment like filters, air pumps, water pumps, or even any special light pump. You can add a layer or lining of sand or gravel to the base of their tanks. You can observe your black moor before permanently determining the type of support to use.

Finally, you can add plants to the tank to provide them with ideal hiding spots and help with natural water cleanup. They often prefer free-floating plants such as hornwort.


One of the most natural species of aquarium fishes to look after is the black moor goldfish. They are suitable for even beginners because they don’t have extreme environmental demands. They are an incredible variety of goldfish that you will love to watch when they swim around your tank at home. You must, however, properly feed them and kept for them to remain healthy.

The joy of every aquarium owner is to watch their fish grow from fry to full size. Black Moor can develop between the ranges of 6-8 inches if you properly keep them under ideal conditions. In some cases, they can even bigger if adequately maintained. It is also essential to know that how big black moor can grow can be affected by certain factors like genetics, feeding, water parameters, sex, and other environmental conditions.


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