Why Clownfish Has White Stringy Poop and Not Eating

Have you ever seen a white stringy poop coming from your clownfish?

Do you think the white stringy substance from the clownfish is a symptom of a disease? The article will answer these questions, why a clownfish has stringy white poop and what to do if they have discharge like that.

Why Clownfish Has White Stringy Poop? White stringy poop is a good indication that your clownfish has a bacterial infection that can causes white stringy poop.

Clownfish Has White Stringy Poop

Why Is My Clownfish Poop White?

Clownfish are omnivores meaning they can eat meat or plants. Clownfish can eat algae, worms, and small crustaceans. But just like we humans, they also expel waste from their bodies.

When a fish poops, it is expected that the waste product will show some color slightly similar to what they eat. When a fish is sick, its poop may not look the same.

White poop from a clownfish is unusual, but it doesn’t entirely mean it’s a sign of disease or parasite; you shouldn’t be so concerned about it. White poop from a clownfish can come in different forms having different meanings.

A white, almost transparent poop doesn’t poop, but a mucus coating, which the fish expels, signifies the fish isn’t eating well. While white, stingy, lumpy poop could be a sign of parasitic infection caused by tapeworms or roundworms.

Bacterial infection is another cause of white poop. Before treating the fish of any disease, first, observe the fish.

How To Treat a Clownfish With White Stringy Poop

Fish poop is one of the best indicators of internal illness. Regular fish poop is said to have a solid consistency that doesn’t have an actual color. It depends on what the fish eats. But it is always good to observe your fish poop because they are indicators of any disease or infections.

When a clownfish poop is white, it signifies your fish isn’t feeding well. But if the poop is white stringy poop, then it could be a sign of disease, bacterial infection, parasitic infection, or a high level of stress.

These bacterial infections can be cured with antibiotics, while parasitic infections can be cured with praziquantel.

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White stringy poop caused by a high level of stress may be due to change in the environment making them feel stressed.

Once the clownfish adjust, they may likely stop pooping that way. Clownfish get stressed; if you want them to be relieved, find the stressors and take them out, whether it’s an aggressive fish or a new decoration.

What Colour Should Clownfish Poop Be?

There is no particular color to tagged a clownfish poop as it generally depends on what they eat. For instance, If the clownfish eats algae, its poop will be green, or if it eats meat, the poop color will appear pink.

But if a fish poop suddenly changes from a healthy brown color to white stringy poop, then that indicates the fish has either a bacterial or parasitic infection.

Why Are My Clownfish Not Eating, Are they ill?

Clownfish not eating shouldn’t be a concern in most cases. When they are in a new environment, they get stressed and tend not to eat, but after some time, it gets comfortable, they start eating. There are also other reasons your clownfish may not be eating. Let’s discuss a few of those reasons ;

1. Changing the tank

Changing the tank is one of the most common reasons why clownfish may stop eating. Like I said before, if a clownfish is in a new environment, it would likely stop eating. Transferring the fish into a new tank can make them stop eating because they aren’t used to the new environment, but once they get settled, they start eating.

2. Change of diet

A clownfish may reject the food if what you are feeding them is different from their usual meal. Since clownfish are omnivores, they can eat both meat and plant. Try feeding them live foods to boost their appetite.

3. Wild-caught or aquarium clownfish

Wild-caught usually takes time to adjust to certain kinds of food like flakes. Clownfish raised in a tank or aquarium aren’t so challenging to handle because they are used to those types of food already.

All these shouldn’t be reasons to be worried. When your clownfish get hungry, they will come out to eat. However, If your clownfish happens to continue with poor eating habits, then it probably means they may be sick. But it would help if you still did more investigation to be sure.

Signs Your Clownfish are ill

Sometimes we mistake some unusual activity of a fish to mean it’s sick, but it may not be sick if the poop is clear white. It just means it hasn’t been feeding well. Sometimes it may just be stress no need to worry too much. But particular signs tell if a fish is sick, I will be sharing a few signs in this article they include;

  • Change in colour the fish may appear dull-looking slightly dirty
  • Trouble in breathing
  • Swollen eyes

Signs Your Clownfish Has Parasites

There are signs that show your clownfish has parasites. A sign of parasitic infection can be detected in their poop. The poop color will change to stringy white, which may indicate bacterial or parasitic infection.

The poop usually hangs on the fish bottom but eventually breaks off. Another sign is poor appetite or spitting out food.

A common disease caused by parasites is known as Clownfish disease, an infestation of Brooklynella hostilis. This can also affect other fish, such as Angelfish. The signs of this disease include;

  • Swollen gills
  • Irregular breathing
  • Shedding of skin
  • Clogging of gills

This can be cured by formalin.

When a clownfish has a parasite infection, some drugs can help cure them. But you need to also put into consideration the quality of water. If the water quality isn’t good, the fish will get infected.


Clownfish are delicate and easy to keep, though you need to consider certain conditions to avoid diseases and infections. The clownfish is very delicate and must be taken care of properly. White stringy poop can be caused by bacterial infection, but the good thing is there is a cure.


























Hello, I'm Jason. I'm the guy behind HelpUsFish.com. I volunteer at my local fish shop and I created this site to offer tips and advice on the fish I care for.