Cory Catfish Laying on Side: (Top 5 Reasons & Solutions)

Has your Cory Catfish been lying on its side? If so, you may be concerned that something is wrong. Cory catfish laying on side breathing fast can be a sign of illness, but it isn’t always the case.

Corydoras catfish floating on the side can be a common problem for this fish.

There are several potential reasons why your Cory catfish might be lying on its side, and it’s vital to address the issue as soon as possible to prevent any long-term health problems.

Cory catfish laying on side breathing fast

In this ultimate guide, we will explore why Corydoras Catfish lay on their sides and provide some possible solutions to help get them back up and swimming normally again.

We’ll go over the five most common reasons for corydora laying on side and determine what advanced measures should be taken to bring your beloved pet back to health. Keep reading to learn more!

Do Cory Catfish Sleep?

Yes, Cory Catfish, do sleep! This fish remains primarily active during the day and can be seen swimming around, looking for food. However, they can also rest peacefully in the same spot for several hours.

How to save a dying Cory catfish

During this rest period, their metabolic functions slow down, and fish are believed to enter a light sleep-like state. This is why your Cory fish may be seen lying on its side and not moving much.

Why Is My Cory Cat fish Laying on Side Breathing Fast?

Why is my Cory catfish floating on its side? Albino catfish laying on its side can be caused by stress, improper water parameters (pH, temperature, and ammonia levels), or bacterial infection.

If your albino Cory catfish just laying around, has a decreased appetite, and Corydoras breathing fast, it could indicate an underlying health issue. In this case, monitoring your sick fish closely and contacting a vet if necessary would be best.

If you notice that your stressed cory catfish is still lying on its side but isn’t breathing fast, it could be due to stress or poor water conditions.

The Reasons Why A Cory Catfish Will Be Laying On Its Side

Why is my catfish laying on its side? Corydoras catfish are one of the most popular types of aquarium fish, but they can sometimes be challenging to keep healthy. 

One common problem that Cory fish owners face is when their Corydoras laying on side. This can be a red flag that something is wrong with your fish and needs to be corrected quickly.

Here are the top 5 reasons why Corydoras catfish lay on their sides and solutions to help correct the problem.

Cory Catfish Has Swim Bladder Issues

Inappropriate water temperature is likely to result in swim bladder problems. Hot water may cause the body to lose weight and cause diarrhea, bowel irritation, and even kidney failure.

Watching your cory catfish suffer and being painful can cause a problem with swimming bladders. Moreover, eating excess foods causes the swim bladder to irritate and the intestines to expand. Symptoms of the disease are bloated and swelling.

Cory Catfish Just Laying Around

Your Corydora catfish may just be bored and laying around due to a lack of stimulation. To prevent this, add some decorations and plants in the fish tank, as they’ll give plenty of places to explore and hide.

Corydora catfish love to play, so add a few toys, such as an aquarium, volcano, or other interactive toys. These toys and adding other fish and peaceful tank mates will help to keep them active and engaged in their environment.

Cory Catfish Is Stressed

Changed Cory Catfish behavior is usually a sign of stress. Overcapacity and space constraints can be the leading causes of stress on this fish species.

Since Corydoras catfish are schooling fish, the species prefers to swim in groups. At least six Cory catfish can be placed in a gallons water tank.

A smaller community tank may limit Cory catfish movement during swimming. Cory catfish need companionship like humans; it could be lonely fish that might withdraw and just lay there.

Poor Water Quality

Poor water conditions can explain why catfish have swim bladder disease. Corydora Catfish that live in muddy water can be irritated and are vulnerable to many diseases and parasites which cause bladder problems.

There is a high likelihood of ammonia spikes occurring. Ammonia spikes can destroy your catfish body, gills, and fins. Low nitrates and phosphate concentrations may also lead to serious health problems like swimmer’s bladder disorders or stroke.

Cory Catfish Laying Eggs

Finally, if your Cory Catfish is lying on its side and not moving, the fish may be about to lay eggs. Cory Catfish are egg-layers, meaning they will lay eggs on surfaces in the tank, such as rocks and plants.

These eggs are typically a soft creamy color and can be challenging to spot. If you notice your Cory laying on side near plants or rocks, eggs are likely the cause.

These are some of the common reasons fish lay on their sides. If you’re still unsure of the cause, it’s best to contact a vet or a local aquarium expert for further advice.

The best way to identify the issue is to look closely at your tank environment and observe your fish’s behavior. Once you have identified the case, you can work on correcting it and keeping your Cory Catfish healthy and happy.

Is It Normal for Corydoras Catfish to Lay Upside Down?

The Cory catfish can lay upside down in an unnatural way. The Cory catfish must be upside down because the cause is incredibly complicated for some. Your Cory catfish lay upside down due to some swim bladder issues.

Constipation or blotting causes a Cory Catfish to lie upside down. When your Corydoras swam upside-down, this is a severe problem and should be immediately addressed.

Swim bladder disease can cause Cory catfish to develop critical conditions and may cause death unless it is diagnosed at the earliest.

Do Cory Catfish Lay on the Bottom?

Cory laying on the bottom of the tank is very common, and it can mean different things. It’s important to note that Cory Catfish are bottom-dwellers, so it’s normal for you to find them at the bottom of the tank.

But, if your Cory Catfish is lying on its side or upside down, this could indicate poor water quality, swimming bladder disease, stress, or even a sign that they are about to lay eggs.

Regardless of the cause, you must fix the issue immediately to ensure your Cory Catfish remain healthy and happy.

Why Is My Corydora Resting Upside Down?

Cory catfish laying upside down is a sign of swim bladder disease. This disease can be caused by poor water conditions, constipation, or overeating food in one sitting.

Swim bladder disorder causes the fish’s internal organs, such as the stomach, stomach gills, and fins. Insufficient nitrates and phosphate concentrations may also lead to serious health problems like swimmer’s bladder disorders or stroke.

What are the Reasons of Swim Bladder Disease in a Corydoras Catfish?

Poor water conditions, such as high nitrite levels, ammonia, and nitrate, cause swim bladder disease in Corydoras catfish.

If these levels increase beyond the recommended concentration, they can cause an infection of the fish’s swim bladder that can be fatal if left untreated.

Other factors contributing to swim bladder disorder include improper feeding (feeding too much or too little), bacterial infections, parasites, and genetic issues.

Constipation can be a significant contributor to swim bladder issues in cory catfish. To remedy this, feeding your fish an easily digestible boiled pea may provide relief and promote healthy digestion!

How to Fix Swim Bladder in Cory Catfish?

How to treat swim bladder? The first step to fixing the swim bladder in Cory catfish is to ensure optimal water conditions.

Check your ammonia, nitrite, and nitrate levels to ensure they’re within the recommended ranges. You can also add water conditioners such as Stress Coat to help reduce ammonia and nitrite levels.

You should also adjust your feeding regime and only feed your Cory Catfish what they can consume in a few minutes. If you notice that your bloated Cory catfish, fasting them for a few days may help reduce the issue.

In some cases, a vet may have to provide medication to help with swim bladder issues. This is why it’s essential to consult a qualified aquarist or aquarium expert for further advice.

If you are still unsure and worried about the health of your Cory Catfish, consulting a vet is the best option, as they can provide more detailed advice and treatment.

Treatment For Cory Catfish Laying On Its Side

Once you determine why your Cory catfish lies at side, you can begin treating it if necessary. If you have any questions about your condition, ask an expert veterinarian. Contact an experienced veterinarian for an examination of your situation.

Make sure your tanks are cleaned every day to avoid excess clogged tanks. Make sure the Cory catfish has at least 6 different species.

Do not overfeed Cory fish; feeding should occur twice daily. They will decide what amount is consumed within 3 minutes. Keep water temperature constant from 72 ° F depending on species.

Ensure Adequate and Stable Water Parameters.

Ensuring adequate water parameters is essential for the prevention of bladder problems. Give the cory catfish water temperature between 60-82oF. Ensure that the water has a pH of 7.

Check water hardness to 3-5dG. Add a heating system to the aquarium to help maintain the temperature. Add a thermometer to your catfish aquarium daily to check your temperature.

Cycle Your Tank

Cycling tanks are vital for their successful operation, ensuring successful fish survival. The tank can maintain the proper biological balance with a cycle – it does not contain good bacteria.

This organism is critical for the nitrogen cycle, transforming fish waste into NO2 and NO3 that plants can consume. It is advisable to let your tank go for about 3 months if it is affected by New Tank Syndrome. It causes high levels of nitrites that are deadly to the fish.

Afterward, the water parameters must remain static, and your tank has a biological equilibrium.

Quarantine Fish

When you get fish, you should quarantine it to prevent the spread of diseases. If pet shops do not quarantine animals, keeping fish in a quarantine tank is recommended.

This is extremely important when you have Cory catfish because they are sensitive to changes. Watch for signs of infection or disease in the quarantine tank and treat accordingly.

Feed A Varied Diet

A varied diet is vital for the Cory Catfish. A balanced diet will provide all the necessary vitamins and minerals for a healthy fish.

Different types of food can be offered, such as frozen, live, and flake foods. This will help ensure your Cory catfish gets all the nutrition it needs.

Overall, the swim bladder in Cory catfish can be managed if you are aware of their needs. It is crucial to provide them with healthy habitat and proper diet and ensure water parameters. With the right care and attention, your Cory Catfish can live a long and healthy life.

How Do You know if Your Cory Catfish is dead?

If you flush Cory catfish into the sink, you should ensure the fish is no longer alive. To do this, look for indicators such as fins not moving, the eyes being sunken in, and the fish having a greyish color on its body. If you notice these signs, your Cory catfish is likely dead.

Furthermore, if the fish does not respond to you touching it, then the Cory catfish is likely dead. If the fish smells strange, it could also confirm that it is no longer alive.

Signs Your Cory Catfish is Dying

The Cory Catfish is a lively, curious fish. The healthy cory catfish should regularly scavenge the water tank to get food and breathe. Likewise, it will be beneficial if there are any changes to the tank.

An average person will usually not be so difficult to detect a particular behavior—this list of sick and dying Cory catfish symptoms.

  • Unusual swimming behavior – If the Cory Catfish constantly swim at the bottom of the tank, this could be a clear sign that something is wrong.
  • Not eating – If you notice that your Cory Catfish is not eating its food, this could be a sign that something is wrong.
  • Unusual coloration – A healthy Cory Catfish will have a bright, vibrant color. If it looks pale, this could be a sign that something is wrong.
  • Cloudy eyes – If your Cory Catfish’s eyes look gray and dull, this could be a sign of illness or death.
  • Fleshy growths – If your Cory Catfish has any fleshy changes, this could be a sign of infection.
  • Erratic swimming  If your Cory Catfish is swimming in circles and appears to be struggling, this could be a sign of illness.
  • Excessive slime – If your Cory Catfish is covered in excessive slime, this could be a sign of illness.

If you notice any of these symptoms in your Cory Catfish, taking it to a vet is highly recommended for proper diagnosis and treatment.


All in all, taking extra care of the Cory Catfish is essential if they display any unusual behavior. If your Cory catfish is lying on the side with rapid breathing for long periods, quick action can help them recover and return to their daily activities. When dealing with a Cory Catfish’s sides-laying issue, you should always consider checking for ammonia poisoning, unstable water conditions, inadequate nutrition and starvation, irregular swim bladder functioning, and improper tank maintenance.

Fortunately, each one of these issues has a solution that should speak to the needs of the individual fish. Knowing how to manage these situations and handle primary fish care properly can be considerable advantages in maintaining healthy fish tanks with happy fish. Keeping a close eye on your Cory Catfish while investing time into setting up an ideal tank environment will ensure that they remain lively creatures in your home aquarium!

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About Me

I am the founder of, a devoted wife and mother, and an avid fish enthusiast. My aim is to assist fellow fish lovers worldwide in understanding how to properly care for and breed their pet fish.

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