Neon Tetra disease is caused by a parasitic organism known as Pleistophora Hyphessobryconis that feeds on the host fish until the fish is dead. This is a communicable disease that is caused when fish eat other dead fish or even from eating live food servings such as those from Tubifex. Live food can act as a carrier of the disease and also transmit it to your fish once they eat it.

The parasitic organisms enter the fish and invade the stomach and the digestive track and consume the fish from the inside out. There are a few different key signs and symptoms that will appear if your fish are suffering from Neon Tetra disease which will be discussed in the following section. The unfortunate part is that there is no real cure for the disease, and more so, fish aren’t the brightest creatures and they will eat other dead fish when given the chance.

Symptoms of Neon Tetra Disease


There are a few different apparent signs of Neon Tetra diseases and none of them are pretty. One of the most obvious signs that your fish are infected with Neon Tetra disease is the fact that they will be covered with white bumps or cysts. These white cysts will grow in size and number as the disease progresses.

Another symptom that your fish will develop as the disease progresses is the loss of color, especially bright colors, and this will be more apparent the more colorful your fish is.

This loss of color will become very severe as the disease takes an increasing toll on the fish and eventually lead the fish to become pale white in color. Another thing that needs to be noted is that fish that are suffering from Neon Tetra disease are also more susceptible do developing other diseases such as fin rot.

The Neon Tetra parasite, because it consumes the fish from the inside out, will also sap the fish of energy and essential interior parts will begin to deteriorate. This will result difficulty or even an inability to swim properly.

This disease may even go so far as to cause the fish’s spine to become warped and curved which will drastically limit the ability of the fish to swim. The fish will also begin to exhibit weird behavior that is not normal for fish to display.

As the name implies, this disease does affect Neon Tetra fish the most, but that doesn’t rule out other species. Other fish that are susceptible to catching Neon Tetra include Angelfish, Barbs, and Rasboras.

Most other fish can develop the disease however they are unlikely to do so. The only fish that shows a great deal of resistance to Neon Tetra disease is the Cardinal Tetras.


Unfortunately for fish lovers and aquarium enthusiasts around the world, there is no known treatment for fish that are suffering from Neon Tetra disease. There is no medicine to slow down the effects and there is nothing that can be done to cure the fish.

The most common practice when you have fish suffering from Neon Tetra disease is to humanely euthanize them. You need to separate the infected fish from the ones that are still healthy in order to stop any further transmission of the disease.

One can always try an antibacterial treatment even if it looks like Neon Tetra. It may not be Neon Tetra disease, in which case it may be a bacterial infection, treatable by regular medicine.