Max Size: 10cm

Black Moor Goldfish (Carassius auratus auratus)

Black Moor Goldfish are very popular in the hobby, and you can find them in collectors tanks worldwide. Their hardiness and ability to live in colder temperatures make them excellent pets. Black Moor Goldfish are ideal for outdoor ponds. However, even though the Black Moor Goldfish are hardy enough to withstand colder climates, you must make sure that the cooling drops only a few degrees a day.

Black Moor Goldfish are considered great beginner Goldfish. However, unlike the similarly egg-shaped Ryukin Goldfish and Fantail Goldfish, you should not keep the Black Moor Goldfish with highly competitive tankmates as their telescopic eyes can cause them to see poorly. For this reason, the Black Moor Goldfish does not compete well for food and is also subject to injury and infection. Ideal tankmates for these Goldfish would be the equally handicapped but less hardy species such as the Telescope Goldfish, Celestial Goldfish, and Water Bubble-Eye Goldfish.

Black Moor Goldfish will typically reach about 10 cm in length, though some hobbyists have reported that their Black Moors have grown up to 25 cm. The average lifespan of this species is 10 to 15 years, though it is not uncommon for them to live 20 years plus in a well-maintained Goldfish aquarium or pond.

Black Moor Goldfish have rounded or egg-shaped bodies. Their rounded shape is heightened by large bulbous eyes protruding from the sides of their head and their long, flowing fins. In addition, these fish have deep velvety black metallic scales, and the juveniles have a dark bronze colour with dull eyes. As they mature, they turn black, and their eyes begin to telescope. The Black Moor Goldfish is essentially a black version of the Telescope Goldfish; however, their eyes don't protrude quite as far.

While most Black Moor Goldfish stay black in various environments, some individuals may change colour with age, fading to grey. They can also regress to a metallic orange when kept in warmer water. Black Moor Goldfish is available with a beautiful veil tail; however, today's individuals can also have a butterfly tail, a broad tail, or a ribbon tail.

Quick Facts
Scientific NameCarassius auratus auratus
Other NamesBlack Demekin, Dragon Eye Goldfish, Black Peony Goldfish
Aquarium LevelAll Levels
DifficultyBeginner - Intermediate
Lifespan10 - 15 years
Water Parameters
Water TypeFreshwater
PH6.0 - 8.0
GH5 - 19
65 - 72℉
18.3 - 22.2℃


Black Moor Goldfish
Black Moor Goldfish
Black Moor Goldfish
Black Moor Goldfish
Black Moor Goldfish
Black Moor Goldfish

Natural Habitat

Black Moor Goldfish originated from the Prussian Carp species in Siberia in Central Asia. Then after centuries of breeding, the wild carp morphed into the domesticated species you see today.

These Goldfish inhabit slow-moving and sometimes dirty waters in ditches, ponds, lakes and rivers, feeding on plants, insects, small crustaceans and detritus. Black Moor Goldfish are commercially available globally and are just one of over one hundred captive-bred Goldfish varieties that you will find in today's aquariums.


Black Moor Goldfish are omnivorous fish; therefore, you should offer them a balanced diet of plant and animal-based foods. You may also find your Black Moor gnawing at some algae you might have in your tank, though you should never use them to control any algae problems.

If feeding fish flakes, make sure they are made explicitly for fancy Goldfish. Like the black moor, round-bodied Goldfish are prone to swimbladder issues, and an excellent high-quality fancy goldfish food can help prevent digestive problems.

It would be best to also supplement fish flakes with frozen and freeze-dried foods such as daphnia, bloodworm, tubifex and brine shrimp. However, freeze-dried foods should always be presoaked in some tank water before feeding your black moor; this will help your fish digest the food and help prevent them from becoming constipated.

Ideally, it would be better to feed your fish once or twice a day, only giving them what they can consume in 3 minutes or less, only providing small amounts of food to ensure that everything gets eaten.

Sexual Dimorphism

It is very challenging to distinguish male from female Black Moor Goldfish when they are young and not in the breeding season. However, males are typically smaller and slimmer than the female. When in breeding status, the males will display white tubercles on their heads and gill covers, and the females will have fatter abdomens when carrying eggs.


The Telescope Goldfish is an egg layer that will quickly spawn if given the right conditions. You can breed them in groups as small as five individuals; however, they are very social fish and will also produce in larger groups.

Unfortunately, the only time Goldfish will spawn in the wild is in the springtime. Therefore, to breed these fish in captivity, you will be required to mimic the conditions that you will find in nature.

It would be best to provide your fish with an aquarium of at least 75 litres and ensure they are healthy and disease-free. In addition, some breeders recommend that you treat your fish for parasites and separate the females and males for a few weeks prior to breeding to help boost their interest in spawning.

It would be best if you then introduced the fish into a breeding tank at the same time. The breeding tank will need plenty of oxygenating plants and some decor with solid surfaces for the eggs to adhere to; you can also use artificial plants or spawning mops.

To induce spawning, you should slowly drop the temperature to around 60 degrees Fahrenheit and then slowly warm the temperature at a rate of 3 degrees daily until they spawn. Feeding your fish with lots of high protein food such as earthworms, brine shrimp, or black worms will also induce spawning.

Before spawning occurs, as the temperature increases, the male will chase the female around the aquarium in a non-aggressive way. This display can go on for several days, and the fish will intensify in colour.

During spawning, the fish will gyrate from side to side, and the male will push the female against the plants. This behaviour will excite the female into dropping tiny eggs, which the male will then fertilise. Sticky threads will attach the eggs to the plants or spawning mops.

Spawning can last two to three hours, and a female can produce anything up to 10,000 eggs. Unfortunately, the parents will start to eat as many eggs as they can find; therefore, you should remove the parents after spawning is complete.

The fertilised eggs will usually hatch within 4 to 7 days, depending on the temperature. You can then feed the newly hatched Goldfish speciality fry foods until they become big enough to eat baby brine shrimp or flakes; alternatively, you can offer the same food as you provide the parents as long as it is crushed finely.

Initially, the fry will be dark brown or black; this will allow them to hide better and not be eaten by larger fish. Once the babies grow to around 2.5 cm, they gain their adult colour, at which point you may put them in with larger fish.

Other Goldfish of interest

Lionhead Goldfish(Carassius auratus auratus)
Shubunkin(Carassius auratus)
Telescope Goldfish(Carassius auratus auratus)
Date Added: 26/05/2021 17:39:26 - Updated: 17/11/2021 03:31:49