Do you have a goldfish pond and are looking for a new addition? Have you been considering the black Moor goldfish? These fish are beautiful and can amplify your aquarium elegance with their captivating appearance.

You must be wondering- is it a Goldfish, and what is unique about it? When people hear about Goldfish, their imagination gets stuck on the golden-hue fish swimming in the water bowl.

On the other hand, Goldfish come in a variety of colors and forms in the aquatic environment. One such mesmerizing and classic fancy Goldfish is Black Moor, and it ranks amongst the most desirable marine pets across the globe.

In this article, we will provide a beginner’s guide to Black Moor Goldfish, including information on their upkeep and feeding habits to ensure that you provide them with the best possible care.

Black Moor Goldfish -Telescope Eyed Fish-Care

All about the Species – Black Moor Goldfish

Quick Species Facts
Scientific Name Carassius auratus
Other Common Names Dragon Eye Goldfish, Black Moor, Black Telescope Goldfish
Family Cyprinidae
Origin China
Lifespan 10-15 years
Size 4 to 8 inches
Type Freshwater Fish

Species Overview

The Black Moor Goldfish (Carassius auratus) is a color mutation of the Telescope Goldfish that originated from Central Asia and was later traded across the globe. It is a beautiful and ornamental aquarium fish known for its unique appearance.

The Black Fancy Goldfish are popular glamourous freshwater fish with two bulging eyes and black scales that differentiate them from other Goldfish. Due to their rare traits, they are tagged as different names in different parts of the world, such as Black Telescope Fish, Googly-Eyed Goldfish, Dragon Eyes, Black Demekin, and more.

They originated in China’s tropical water bodies, i.e., rivers, ponds, streams, and other freshwater bodies. Initially, they were not recognized as Black Moor. Later, these beautiful fish were traded to different parts of the world, including Europe, America, and Japan.

Black Moor is a very accommodating fish and adapts to the water conditions exceptionally well. However, they have myopia (short-sightedness) and are known as slow-movers.

Origin and Habitat

Interestingly, the Black moor results from the biological development of the Goldfish. They are descendants of the wild Silver Prussian Carp, which originated in different parts of Asia, mainly Central Asia. The earliest traces of the Black Moor Goldfish can be found around the 15th century in China.

Black Goldfish’s natural habitat is predominantly found in slow-paced stagnant rivers and artificial water bodies like lakes or ponds. They are not found in the wild and cannot survive in the raw habitat. They are the result of organized captive-bred and ecological evolution for a few centuries.

Size: How Big Do Black Moor Goldfish Get?

There is a lot of talk about the standard size of the Black Moor Goldfish. Well, depending on the habitat conditions, the Black Moor Goldfish’s full size varies from 4 inches (10 cm) to 8 inches (20 cm). Notably, some genetic attributes also influence the natural size of this pristine species along with living conditions.

At complete maturity, some of these full-grown Black Moor Goldfish may reach up to a whopping maximum of 10 inches. So, ideal tank size and proper nourishment help them grow better and attain their potential size.

Appearance of the Fancy Black Goldfish

When it comes to appearance, Black Moor Goldfish are considered one of the most vivacious and desirable aquatic pets. They have an elongated body and round-shaped belly enveloped with pigmented black scales.

During the growth period, i.e., juvenile, the black big-eyed fish looks paler and gets darker as they attain maturity. Interestingly, their round-shaped and protruded eyes are the most captivating feature and are often tagged as black bubble eye fish.

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The fish have solid black-shaded coloration on the body, accompanied by some shimmering golden or orange patches along with the fins and tail. One can witness the unique frontal nostrils, which depict the carp lineage, for which they are often labeled as Double Tailed Goldfish.

The trademark telescope eyes of the Black Moor Goldfish, which bulge on either side of their head, is the rarest feature. It is also said that Chinese people tagged Black Goldfish as “Dragon Eyes Fish” due to their peeking telescope eyes.

Research has shown that their eyes might expand and over grow after the embryonic phase.

Quick Fact: Even with bulging eye lenses, this Black bubble-eyed Goldfish is recognized to have impaired vision when compared to others.

Lifespan – How Long Do They Live?

People always look for long-term aquatic companions, and Black Moor is famous for having a relatively high life expectancy. If catering to the needs of the fish and offering favorable living conditions, one can expect Black Moor Goldfish’s lifespan to vary between 10-15 years normally.

Moreover, in some cases, the Black Moor may even live up to 20 years if their essential needs are fulfilled meticulously. So, it is evident that the quality of the fish tank has very much influence on their longevity.

How to Know the Gender – Female or Male?

The most common distinguishing feature of this fish is that males tend to be slightly smaller than their female counterparts. If we talk about any visual characteristical difference between male and female Black Moor Goldfish, there is no such critical evidence to help gender identification.

Another way to determine the gender is by observing the behavior of the fish during the mating season. Before the breeding process, the male starts to hover around the female circularly for several days.

However, determining the gender of the baby Black Moor fish is quite tricky, as no unique visual or behavioral impressions can be found. At a young age, both males and females look identical.

Availability & Price

The Black Bug-Eyed Goldfish are highly desirable aquatic pets and loved immensely by aquarists across the globe. Almost all pet stores keep Black Moor Goldfish for sale, and thus you can easily find them in your nearby pet store.

Talking about the prices, they are highly affordable and cost between $5-$15. The charges depend on the various aspects such as quality of the breeding, location, and the effort invested in maintaining the healthier lineage of the fish.

Black Moor Goldfish Care Guide

Quick Care Facts
Care Level Easy
Social Temperament Peaceful and Non-aggressive  
Diet Omnivore
Breeding Egg Layers. Quite easy if kept in suitable surroundings.

Diet and What to Feed

Naturally, Black Moor Goldfish are omnivorous like most Goldfish. Therefore, your beautiful aquatic pet needs a complete and balanced diet consisting of animal and plant-based foods. When it comes to a mixed diet, you always have varieties to pick the optimum feed.

Interestingly, they love to eat whatever you throw in their basket, and they are not very specific or picky about their sustenance. However, it is essential to offer a diet rich in protein, fiber, fats, and other various necessary nutrients. Low-quality food or improper diet may lead to loss of health and discoloration.

Their staple food includes:

  • Flakes
  • Frozen foods (brine shrimp, daphnia, tubifex, and bloodworms)
  • Pellets
  • Green veggies, including lettuce, zucchini, spinach, and peas

It is recommended to feed Black Moor 2-3 times a day. Flakes and pellets are amongst desirable foods, and Black Moor devoured them in rapid succession.

Author Tip: Always maintain a proper routine while feeding. Otherwise, overfeeding leads to indigestion and bloating

Talking about frozen foods, it is advised to soak them before feeding them directly. Hard food may cause constipation due to improper digestion.

Temperament & Behavior

Black Moor Goldfish is considered the most sociable, docile, and delightful fish. They are very aware of their habitat and live well with other companions. It is a fact that Black Moor Goldfish are slow swimmers, so they are very cautious and attentive in their ecosystem. That’s one of the reasons they love to be in groups and swim freely.

As a fishkeeper, if you want to make any beautiful addition to your aquarium ecosystem, Black Moor Goldfish are the best choice. They are known for maintaining harmony and collectively live peacefully with other fellows in the fish tank.

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They form a group and slowly swirl in unique patterns when delighted. On the contrary, the fish conceal themselves in the corner or go behind plants and rocks for cover if threatened. Therefore, it is necessary to have a peaceful aquatic ecosystem comprising cordial tankmates.


The fish commence its mating season in spring, just like other Goldfish, and it usually occurs between April and August.

 You need to create a suitable environment in the fish tank to breed the Black Moor Goldfish. The process is quite simple, and even if you are a starter, you can breed them comfortably.

During the breeding season, you will also notice some visual changes on the male fish – tubercles on the pectoral fins. These tubercles look like tiny white bumps and are easily noticeable.

Text Box: Note: It is recommended to move the breeding pair in separate tanks, or else the parent may consume the fertilized eggs.

The Ideal Setup for Laying Eggs

Black Moor Goldfish use waterbeds to lay their eggs. Adjust temperature to stimulate the breeding process.

Keep the tank temperature within the 60°F- 75°F range and increase the temperature to 3°F every day. The process will help fish to lay eggs.

Importantly, make sure you provide substantial space; the Black Moor Goldfish may lay 10,000 eggs in one spawn.

Post-Spawning Care

Just after spawning, transfer the fish into a separate tank so that they don’t run after the fry or fertilized eggs. Black Moor eggs are iron-rich, and thus fish try to gulp them.

Once hatched, You can provide protein-source food to the fry. Generally, the fry matures after two months, and then you move these small Black Fish in the tank with adults.

Common Diseases

Black Moor Goldfish are happy creatures and can stay healthy for a substantial period in apt living conditions. However, they also need slight attention as they are susceptible to several common illnesses. Let’s know the common issues they face:

Bad Eyesight

As previously stated, Black Moor Goldfish have terrible vision and require nutrient-rich diets, such as protein and iron.


One widespread concern is overfeeding, which can cause digestion problems, diarrhea, and bloating. So make sure your aquatic friends are well-fed and refrain from overfeeding.

Swimmer’s Bladder

Talking about acute diseases, Balck Moor Goldfish may have swim bladder infections that impact the fish’s swimming ability. Their body starts swelling and float irregularly on the surface. You can cure this disease by not feeding the fish for 24 hours and adding fibrous food to their diet, especially green veggies.

Velvet Disease

Another ailment called velvet disease is also common among these Black Goldfish with big eyes. This affliction happens due to a parasite or bacterial infection that leads to discoloration or patches on the body.

Sometimes it may also lead to itching problems. Velvet disease is easily recognizable; it creates small white patches or spots across the fish’s body.

Velvet disease can be cured through medications. However, you also need to prevent this disease from spreading to other fish. Once you notice small white spots, quickly transfer the fish into a separate tank for quarantine or medication.

Black Moor Goldfish in Aquarium
White blemish on black moor goldfish – Image Credit:

Quick Advice: Black Moor Goldfish are very delicate and hard to transfer; therefore, carefully administer the entire process.

Tank Recommendations

Quick Tank Facts
Minimum Size (Individual) 20 Gallons (18 liters) or more
Water Temperature 50 – 75° F (20 – 28° C)
Water Hardness 5 – 19 dGH
pH Level 6.0 to 8.0

Tank Size and What to Keep Inside

Black Moor Goldfish is an accommodating fish found in slow-flowing or stagnant water bodies like lakes, murky rivers, ponds, reservoirs, and canals. So, if you are planning to set up a fish tank for gorgeous Black Moor Goldfish, various aspects need to be considered, such as tank size, filtration, ornaments, and lighting.

Coming to the Black Moor Goldfish tank size, it is recommended to have a minimum of 20 gallons tank. Although these fish are not wild, their long fins and tails need enough space to swim freely, and anything less than that will lead to congestion and hinder their free movement.

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The next question arises related to the substrate – what to put into the tank? Black Moor Goldfish are very adaptable pets and can survive with pretty much anything, as they mostly hang middle water. Therefore, you have a lot of options, i.e., sand, rocks, pebbles, plants, gravel, and marbles. Everything is fine as long as the ecosystem is clean and the surface is smooth.


Black Moor Goldfish creates enough mess and are famous for producing plentiful waste. Therefore, powerful filtration is required for the tank. Canister or sponge-type filtration is highly recommended as they help clean the habitat properly.


Lighting is also one crucial aspect; owning to Black moor’s weak eyesight, they are very light sensitive. Moderate or natural lighting is best for their ecosystem.

Live Plants

Black moor goldfish consume mostly vegetables and seldom touch live plants. Live plants, on the other hand, can sometimes be eaten. So, it’s a hit-or-miss situation with them. You’ll have to figure out which ones your black moor won’t eat. The best choices of aquarium plants for these fish are:

  • Anacharis
  • Vallisneria
  • Hornwort
  • Fontinalis
  • Anubias
  • Java fern
  • Moneywort
  • Ludwigiarepens (alternative names: False Pennywort, Dwarf Jenny)
  • Vallisneria nana (alternative name: Dwarf Val)
  • Marsilea Hirsuta (alternative name: Water Clover)
  • Sagittaria subulata (alternative name: Dwarf Sagittaria)

Water Parameters

Maintaining the quality of the water is an essential task irrespective of what kinds of fish you keep. It is critical to change water from time to time for preserving fish health and proper habitation.

The Black Moor Goldfish thrive in clean water, and that’s why routine filtration is needed. Some of them are very sensitive to water conditions. Dirty or contaminated water can cause irreparable damage to your fish’s health, and they may succumb to toxicity.

The ideal water temperature for Black Moor Goldfish should be between 50°F – 75°F. They are very comfortable with moderate temperatures. You may not need an aquarium heater to maintain the temperature. These fish are flexible with slight changes in the climate.

Expert Tip: Check the water conditions at regular intervals. A proper balance of water hardness and acidity level ensures a great deal of comfortability for the fish.

The required water hardness level range is 5 – 19 DH; anything between this range is comfortable for the Black Moor Goldfish. The pH level of the water tank should be 6.5-7.5. It is pretty neutral and helps fish to thrive.

Tankmates: Best Fish to Keep with Black Moor

When choosing the most compatible Black Moor Goldfish tank mates, you must go for other Goldfish types having characteristics the same as them, like:

  • Lionhead Goldfish
  • Orandas
  • Comet Goldfish

Because they are sluggish in the water, Black Moor Goldfish is scared by hyperactive or fast-moving fishes. Some of the other excellent tank companions who can cope with them are:

Frequently Asked Questions

Can black moor goldfish comfortably live in a bowl?

They require a minimum of 20 gallons of water with adequate filtration and ample free space to move swiftly. Also, they have long fins and tails that need ample room to hover around. Therefore, one shouldn’t put them into a bowl, and they may not survive in the long run.

Can Fantail Goldfish and Black Moor live together?

Yes, both can live together in an ecosystem with utmost happiness. In fact, Black Fantail Goldfish and Black Moor have similar characteristics; both are slow-mover and peaceful. Therefore, Fantail Goldfish is one of the most compatible tank mates for Black Moor.

Do Black Moor fish need a filter?

These fish thrive in well-filtered and clean water. They are considered messy fish and excretes copious waste; therefore, the Black Pet Fish needs a filter to pump the dirty or contaminated water at regular intervals. It is recommended to have an advanced and quick filtration system inside the aquarium.

How much should I feed my Black Moor Goldfish?

You can feed Black Moor Goldfish twice or thrice a day, but avoid overfeeding. The diet should consist of protein, fiber, iron, and other essential nutrients. Lack of proper sustenance can cause discoloration of the fish and eyesight problems.

Takeaway – Should you Get Them for Your Tank?

The Black Moor Goldfish is unique and has special characteristics that stand out from the league. Its popped-up eye and vibrant black coloration entice the audience’s glimpse in one go.

They have serene nature and thrive in clean water, offering excellent companionship for a considerable period.

Their adaptive qualities and serene nature will diversify your fish collection. Therefore, you must get them and enhance your aquarium grace.

About the Author

Victoria Lamb

Victoria is a freshwater aquatics specialist, fish keeper, and amphibian enthusiast. She has had more than 6 years of experience caring for aquariums and keeping several fish species, and her home boasts of 3 aquariums and a garden pond. Her goal is to educate fish owners on raising healthy and happy aquatic pets.

Career Highlights:

  • Has worked with several aquarium manufacturers as a consultant
  • Organized and hosted workshops on freshwater fish keeping at retail stores, educational facilities, and libraries
  • Released content for the amphibian community through her writings

Educational Highlights:

Bachelor of Science in Animal Behavior and Welfare

  • University of Lincoln, Lincoln, UK (2014-2018)

Writing Experience

Victoria has done ghostwriting for many aquarium and pet websites in the past. She has also worked for Canada's largest natural health magazine- ALIVE, with 300,000 monthly circulations as a freelancer. She had six published articles on animal behavior and welfare during her graduation for her thesis.

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