November 22

Sarah Robertson

Get to Know Corydoras Duplicareus: the Playful Fish

The gorgeous striking coloration, peaceful disposition, and active scavenging proclivity make it an extremely popular aquarium catfish. These catfish will grow to a maximum length of 2 inches and eat flakes, pellets, or vegetables as food. When males are kept in dirty water and undergo frequent, minor cold water changes, they will begin the breeding cycle, during which males will pursue plump females.

They should be kept in aquariums with plants and hiding places for protection, as well as a soft sandy substrate to safeguard their barbels while they sift for food. These catfish look amazing when they're combined with other peaceful mid-dwellers and top dwellers in an aquarium.

The lower half of the body is light colored in Corydoras duplicareus males and females, gradually becoming jet black on the upper half. Their eyes have a black stripe above them. The fins, on the other hand, are usually colorless. The most noticeable feature is the bright orange/gold mark that starts just behind and above the eye and stretches forward until it reaches in front of the dorsal fin. From above, the mark takes on the shape of a "V," pointing to the fish's dorsal.

To know more about the care of Corydoras Duplicareus, please read on.

Quick Facts about 

  • Scientific Name: Corydoras(ln9) duplicareus Sands, 1995
  • Common Name of Corydoras Duplicareus: Broad Stripe Cory
  • Distribution: South America, Upper Negro River basin.
  • Average Size: 40mm or 1.6 Inches (4cm)
  • Feeding: Sinking wafers, frozen blood worms, Brine Shrimp and live black worms if available.
  • Temperament: Peaceful
  • Temperature: 20-26 ° C
  • PH value: 5.0-7.0
  • Water rigidity: Soft (1-8 DGH)
  • Minimum Tank Size: 60 cm - 25 inches
  • Substrate type: Sand or gravel
  • Lighting: Moderate or bright
  • Water movement: weak or moderate
  • Lifespan : 3-5 Years
  • Compatibility: A peaceful fish exhibiting typical Corydoras behavior.
  • Suggested Tankmates: Compatible with mid-water swimming fish such as neon or cardinal tetras or other South American Characins.

Corydoras Duplicareus Care 

You'll need a tank at least 60 cm - 25 inches in length and planted with a soft, sandy substrate, as well as some rocks or driftwood for hiding places. Corys are a schooling fish, therefore you'll want to keep at least 6-8 of them together.

This fish prefers water with a pH of 6.0 to 7.2 and a hardness of 2 to 20 degrees dGH. It works best at temperatures ranging from 20 to 26°C or 68 to 79°F. Corydoras Duplicareus is a peaceful fish that does best in a community aquarium with other peaceful fish such as Neon Tetras, Cardinal Tetras, and other small South American Characins.

Although these catfish are peaceful and hardy, they appreciate high-quality aquarium sand like BD Aquarium Sand or very smooth rounded gravel as their substrate.

The aquarium should have some cover in the form of rocks or bogwood, as well as aquatic plants. As with all other species of fish, water quality and general husbandry are critical, and 25% of the water change is recommended on a weekly to fortnightly basis.

Corydoras Duplicareus Size 

Corydoras Duplicareus can grow up to about 2 inches (5 cm) in length, with most specimens falling between 1.5 and 2 inches (4 and 5 cm).

Corydoras Duplicareus Lifespan 

The average lifespan of Corydoras Duplicareus is three to five years, however, some fish have been known to live for up to five years with appropriate care.

corydoras duplicareus

Corydoras Duplicareus Appearance 

Corydoras Duplicareus are fish in the shape of a typical Cory. The lower half of the body is cream in color, while the upper half is black. It has a broad, dark (or "black") beam that runs over the back and it also covers the eyes, making it look like a mask.

Corydoras Duplicareus Vs Adolfoi 

Corydoras duplicareus is similar to Corydoras Adolfoi, but it has a less broad dark band along the back and an even more vivid orange spot in the neck. Corydoras duplicareus has a serrated posterior edge of the pectoral fin, whereas Corydoras Adolfoi lacks one. This disparity is almost unnoticeable to the naked eye. The maximum total length is usually 4 to 5 centimeters.

The posterior edge of the pectoral fin spine of C. duplicareus is serrated, whereas it isn't on C. Adolfoi. This is something difficult to see in a normal aquarium. The easiest method to tell if your fish have these serrations is to put them into a shallow, preferably white, container and illuminate it from underneath.

With the magnifying glass, you should be able to determine whether there are any serrations or not. C. duplicareus is generally stockier than C. Adolfoi, and the black band is usually a bit broader.

Sexual Dimorphism 

It's difficult to tell, but females are generally somewhat larger than males and sexually mature females are rounder and bulkier than males.

Corydoras Duplicareus Behavior 

Corydoras Duplicareus is a peaceful community fish that gets along with other similarly calm non-aggressive species of the same size. There will be other corydoras as suitable companions, but it's worth noting that close-living species such as Adolf corridors, Sands corridors, and Bergessa corridors can breed and produce hybrid descendants.

These Armored Catfish are docile and sociable, so a school of at least four to six individuals is ideal. The unusual aspect about these catfish is that they breathe atmospheric air to supplement their oxygen intake. They rise to the surface, take a lungful of air, and then dive back down to the substrate. This is completely normal behavior, which adds to the clownish aspect of their act.

They are often non-violent, relying on their thick body armor to keep them safe. The spawning of Corys involves large congregations without fighting or displays of dominance. Because of their peaceful attitude, there is rarely any worry about bullying or hierarchy disputes.

Corydoras Duplicareus Food & Diet

Corydoras Duplicareus are omnivores that will eat both dry food and tiny live and frozen prey. To flourish, they require high-protein diets. Unfortunately, they are frequently marketed as "cleaner" fish, implying that they will get enough nutrition by eating algae and other gunk from the substrate.

While they obtain food from the soil as tiny vacuum cleaners, it cannot be assumed that they can only subsist on "leftovers" from other aquarium inhabitants. They are able to consume flakes, granules, tablets, gels, and similar dry food types. It's best to diversify the diet with live or frozen food such as Artemia, Daphnia, Moth, and so on.

Mosquito larvae, tubifex are also good choices. Live food can help bring out their best coloration. Because they are inefficient algae eaters, plant matter must be included in their diet. Actually, for optimum health, they should be target fed a variety of sinking pellets and wafers.

They can consume a lot of food, but they're somewhat sluggish feeders. Feeding long-lasting foods like big pellets, wafers, and Repashy while allowing the Corys to graze on them for a few hours at a time helps keep them fat and playful. Corydoras Duplicareus should be offered food 2-3 times a day in small portions that can be consumed within a few minutes.

Corydoras Duplicareus Tank Setup 

For setting up Corydoras Duplicareus tanks, a general rule of thumb is to use a minimum of 5 gallons (20 liters) for a single fish. They are social animals that do best in groups, so more space should be provided if you plan on keeping multiple Corydoras Duplicareus. Here are a few other things to keep in mind when setting up a Corydoras Duplicareus tank:


Use a fine gravel substrate since they often sift through it looking for food. The finest sand is generally placed on the bottom, but well-rounded gravel may be utilized if it is meticulously cleaned. Because these fish can badly damage themselves on sharp stones while looking for food in and throughout the gravel, it's critical to ensure that the gravel is smooth. They will thrive on the glass bottom of an aquarium also, but if you can provide them with fine sand substrate, you'll see a lot of really interesting behavior as they root around for food.


Because Corydoras Duplicareus are bottom dwellers that prefer still or slow-moving water, a canister filter with a low flow rate is ideal. An under gravel filter can also be used, but make sure the flow rate is not too high.


Since Corydoras Duplicareus are tropical fish, a heater is necessary to maintain a temperature between 72-78 degrees Fahrenheit (22-26 degrees Celsius).


Corydoras Duplicareus do not require special lighting, and in fact, too much light can cause them stress. A simple aquarium hood with an incandescent bulb is more than adequate.


Corydoras Duplicareus are not finicky about plants and will do well with most types of aquatic plants. They prefer live plants, but plastic or silk plants can also be used. Java Fern, Anubias, and Hornwort are good choices.

corydoras duplicareus1


Corydoras Duplicareus are not fussy about decor, but a few pieces of driftwood or rocks can provide hiding places and some visual interest. Be sure to use smooth rocks or gravel to avoid injuring their barbels. Bogwood and dried leaves are appreciated, as well as because they may aid in the formation of beneficial bacterial colonies. These micro-organisms also act as a significant source of supplementary food for future offspring. Slow decomposition of leaves releases tannins and other compounds that are beneficial for simulating natural water conditions.

Corydoras Duplicareus Tank Mates 

Corydoras Duplicareus are very peaceful community fish. While they may not bother tank inhabitants on purpose, their clumsiness around the tank may annoy more delicate fish or others that dwell in the bottom. They should be kept in a group of at least five to six individuals of their own species, but three or four is sufficient if other cory species are present. These fish are ideal for an aquarium with other peaceful fish that require similar water requirements.

This species is known to do well with other peaceful fish like:

  • Neon Tetras
  • Guppies
  • Mollies
  • Anabantoids
  • Cardinal tetras
  • Small characins
  • Cyprinids
  • Dwarf cichlids
  • Platys
  • Swords

They do best with Electric Blue Ram, and Panda Cory as well. While choosing tankmates, make sure that the fish are not too large or too small for Corydoras Duplicareus. Also, be aware of fish that may nip at their fins or harass them in other ways.

Corydoras Duplicareus Breeding 

Corydoras Duplicareus are easy to care for, and relatively easy to breed in captivity. Mature pairs might be induced to spawn after performing a vast, somewhat cooler water change. The eggs are kept between the pelvic fins of the female. The adhesive eggs will then be dispersed onto plants, décor, or the sides of aquariums, and the process will be repeated.

Ideal temperature for spawning is 74°F (23°C) and a pH of 7.0. Once the eggs have been laid, the adults should be removed from the breeding tank, as they may eat the eggs. The eggs are cream in color and are 1.8 millimeters in size. Unfortunately, this species' eggs are susceptible to fungus, so some fish keepers to include a little amount of methylene blue in the breeding tank.

Corydoras Duplicareus Fry 

In 5-7 days, the eggs will hatch, and the young should be fed newly hatched baby brine shrimp. After a few weeks, sinking pellets can be introduced into their diet. Corydoras Duplicareus will reach sexual maturity in about 6 months.

Corydoras Duplicareus Diseases 

Corydoras Duplicareus are prone to several common diseases in the aquarium. Some of these diseases include:


Ich is a parasitic freshwater illness that affects Corydoras Duplicareus fish and causes white, itchy marks on their body. Diagnosing cory catfish with ich is more difficult than in other fish since they are armored, making it hard to spot white patches.

Even if white spots aren't immediately apparent, look for additional indicators of Ich such as flaring (rubbing against rough surfaces in the tank), sluggishness, and appetite loss. If you notice such symptoms, remove the ill fish and place them in a quarantine tank with water that is a few degrees warmer than the home aquarium. Add one teaspoon of salt to each gallon of water in the tank. After that, do a large water change and observe your fish for any recurrence of symptoms.


Dropsy is another common illness in Corydoras Duplicareus fish. Look for a swollen belly and sluggish behavior. Dropsy is challenging to cure, but medicines and salt have succeeded in the past in curing corydoras with dropsy.

Other physical signs on their body like discoloration, irritation, clamped fins or excess mucus production may be present. If your fish is displaying any of these symptoms, remove them from the main tank and place them in a hospital tank with water that is a few degrees warmer than their home aquarium. Be sure to monitor your fish carefully for any recurrence of symptoms.

Tank problems can cause dropsy. Your catfish's immune system is weakened as a result of the tank's circumstances, such as:

  • Small tank capacity
  • Tankmates that are aggressive or hyperactive
  • High nitrate or ammonia levels
  • Overcrowding
  • There aren't enough helpful bacteria.
  • The temperature of the water is either high or low.
Corydoras Duplicareus4

Red Blotch Disease

Blotch is a bacterial infection that affects fish when they are kept in unhygienic conditions or transported under harsh circumstances. Fish suffering from this condition have red, bloody blotches on their bodies with blisters and dead skin.

To avoid red blotch disease, keep optimum tank conditions, and use a soft substrate that won't scratch the fish and raises the chance of bacterial infections. Add one or two teaspoons of tonic salt to each gallon of water, then use a broad-spectrum antibiotic like tetracycline to cure the problem.

Nitrite Poisoning

Nitrite poisoning isn't a disease, but it's one of the most prevalent reasons of early death in Corydoras Duplicareus. When nitrite levels in the water aren't kept under control, it can lead to nitrite poisoning. Cory catfish with nitrite poisoning swim slowly at the top of the aquarium.

To cure nitrite poisoning, change 25% of the water in the tank and add nitrate and nitrite absorbers to the filter. By adding more plants and ensuring you don't overfeed your fish, you can minimize future nitrite spikes.

If you notice any of these diseases in your Corydoras Duplicareus, don't hesitate to take them to the vet for treatment. By keeping a close eye on your fish and their behavior, you can help ensure a long and healthy life for your beloved cory catfish.


How Big Do Corydoras Duplicareus Get? 

Corydoras Duplicareus can grow up to 4cm in length. Their size will depend on the conditions of their habitat and how much they are fed.

How Long Do Corydoras Duplicareus Catfish Live? 

Corydoras Duplicareus typically live for 3-5 years, but some have been known to live for up to 6-7 years with proper care.

Do Corydoras Duplicareus Catfish Eat Algae? 

Yes, Corydoras Duplicareus Catfish do eat algae. They are especially fond of green algae, but will also consume other types of algae in the aquarium.

What Do Corydoras Duplicareus Catfish Eat in the Wild? 

Corydoras Duplicareus are omnivores and their diet consists of small invertebrates, worms, insect larvae, and plant matter.

How Often Should I Feed My Corydoras Duplicareus Catfish? 

You should feed your Corydoras Duplicareus Catfish 2-3 times a week. Overfeeding can lead to health problems, so it's best to stick to a regular feeding schedule.

Do Corydoras Duplicareus Catfish Need to Be in Groups? 

Yes, Corydoras Duplicareus are social creatures and do best when kept in groups of 5 or more.

How Do I Know if My Corydoras Duplicareus Catfish Is Sick? 

There are a few physical signs that can indicate your Corydoras Duplicareus is sick. These include:

  • Discoloration
  • Irritation
  • Clamped fins
  • Excessive mucus production
  • Lethargy
  • Loss of appetite

If you notice any of these signs, it's important to take your fish to the vet for a check-up.

Do Corydoras Duplicareus Clean the Tank? 

Yes, Corydoras Duplicareus are known for their ability to clean the tank. They will consume algae, detritus, and uneaten food that has sunk to the bottom of the tank. This helps to keep the tank clean and free of potential health hazards.

How Often Should I Change the Water in My Tank? 

It's recommended that you change 20-30% of the water in your tank every 2 weeks. This will help to keep the water quality high and prevent the build-up of harmful toxins.

How Many Pellets Should I Feed My Corydoras Duplicareus Catfish? 

It's recommended that you feed your Corydoras Duplicareus Catfish 2-3 pellets per day. You can also supplement their diet with live or frozen foods.

My Corydoras Duplicareus Catfish Keeps Swimming to the Surface. Is This Normal?

Yes, it is normal for Corydoras Duplicareus Catfish to swim to the surface of the tank. They often do this in order to gulp air, which they need for their digestive system. However, if your fish is doing this excessively, it could be a sign of stress or poor water quality.

Should I Be Concerned if My Corydoras Duplicareus Catfish Is Not Eating? 

Yes, you should be concerned if your fish is not eating. This could be a sign of stress, illness, or poor water quality. If your fish is not eating, take them to the vet for a check-up.

My Corydoras Duplicareus Catfish Keeps Hiding. Is This Normal? 

Yes, it is normal for Corydoras Duplicareus Catfish to hide. They often do this in order to avoid predators or escape from bright lights. However, if your fish is hiding excessively, it could be a sign of stress or illness.

What Should I do if My Corydoras Duplicareus Catfish Gets sick? 

If your fish gets sick, take them to the vet for a check-up. There are many diseases and parasites that can affect fish, so it's important to get a diagnosis from a professional. Treatment will vary depending on the illness or disease.

Final Thoughts 

Corydoras Duplicareus Catfish are a popular type of freshwater fish that are known for their ability to clean the tank. They are easy to care for and make a great addition to any aquarium. If you're looking for a low-maintenance fish, Corydoras Duplicareus Catfish is a good option.

They are peaceful fish that do well in groups and prefer to hide among plants and rocks. Their diet consists of small invertebrates, worms, insect larvae, and plant matter. They are relatively easy to breed in captivity. The female will lay eggs which the male will then fertilize. The eggs will hatch after 5-7 days and the fry will be free-swimming a week later.

It's important to keep an eye on your fish and look for signs of stress or illness. Maintaining proper water quality is also essential to the health of your fish. If you take good care of your Corydoras Duplicareus Catfish, they will thrive in your aquarium.

If your fish gets sick, take them to the vet for a check-up. With the proper care, Corydoras Duplicareus Catfish can make a great addition to any aquarium. Thanks for reading!

Sarah Robertson

I am a passionate blogger who also happens to be a fish keeping enthusiast. Writing about my hobby is something that I absolutely love to do, and it's no secret that my chosen topic is always centered around fish keeping.

Sarah Robertson

{"email":"Email address invalid","url":"Website address invalid","required":"Required field missing"}

Subscribe to our newsletter