Your Guide to Internal Parasites


Internal parasites are a common problem among fish and can cause a wide variety of symptoms. At iFISH Store, we are dedicated to sharing our knowledge about common internal parasites. Continue reading to learn common symptoms to watch out for, how they can affect your fish, and how to treat them. Get in touch with our team with any questions, and shop our wide selection of freshwater fish online today! 


fish in tank

What Are Internal Parasites? 

Internal parasites are tiny creatures that live inside the body of fish. There are many different types of internal parasites, and they can affect fish of all sizes. Some common types of internal parasites include flukes, tapeworms, and nematodes. 


fish in tank

Symptoms of Internal Parasites 

Internal parasites can cause a wide variety of symptoms in fish. Some common symptoms to watch out for include: 
  • Flashing or rubbing against objects
  • Loss of appetite
  • Clamped fins
  • Lethargy
  • Excessive mucus production
  • Weight loss



fish in tank

How Do Internal Parasites Affect Fish? 

Internal parasites can cause a wide variety of problems for fish. They can damage the internal organs, including the liver and kidneys. In some cases, internal parasites can even be fatal. 


fish in tank

How to Treat Internal Parasites 

There are a few different ways to treat internal parasites in fish. One common treatment is using freshwater baths with salt added. The salt helps to kill the parasites. 

Another option is using medication such as praziquantel or metronidazole. If you are treating your fish for internal parasites, be sure to follow the instructions on the package carefully and get further advice from a qualified fish expert.




If you think your fish may be infected with internal parasites, it is important to get them treated as soon as possible. At iFISH Store, we are here to provide you with the information needed to keep your freshwater fish healthy. Shop our wide selection of freshwater fish online today or contact our team with any questions! 

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