What does goldfish fin rot look like?

In the early stages of fin rot, the edges of the fins will discolor, appearing milky on the edges. Often this change is so subtle that it goes unnoticed until fraying of the fins or tail begins. As the infection spreads, small pieces of the fins die and begin to fall off, leaving a ragged edge.

How do you treat tail rot on goldfish?

How to treat your fish for fin rot:

  1. Syphon the gravel at the bottom of the aquarium to remove any waste and debris.
  2. Do a 25% water change of your fish tank.
  3. Check and monitor your water conditions.
  4. Move the affected fish to a quarantine tank if not all fish show signs of fin rot with a separate net.

Can a goldfish recover from fin rot?

Tail rot disease or fin rot as it is also known is a bacterial condition. If left untreated, it will gradually move inwards towards the base of the fin. If it gets into the caudal peduncle, as has happened in the image below, the fish may not recover. At best, it may recover but the tail fin doesn’t grow back.

How do I know if my fish have fin rot?


  1. Fin edges turn black / brown.
  2. Fins fray.
  3. Base of fins inflamed.
  4. Entire fin may rot away or fall off in large chunks.
  5. Fins have white dots (if these are seen on the body it is possibly a symptom of Ichthyophthirius multifiliis)

Does goldfish tail grow back?

Prognosis. In most cases, fish will regrow their fins and tails, often looking just as good as the originals in most cases. However, if you let fin rot go on too long — and it does progress quickly — more serious infections can set in and kill the fish.

Why is my goldfish tail shredded?

Fin rot is a common symptom of a bacterial disease that can affect a variety of fish, from Betta fish to goldfish. It is often caused by a dirty tank, poor care, or exposure to other fish who have infectious diseases. Your infected fish may have fins that appear to be torn and ragged, as if they are rotting away.

How long does it take for a goldfish tail to grow back?

How Long Does it Take for Fish to Recover from Fish Rot. With the immediate detection and proper treatment of fish fin rot, you can start to see fin recovery within 4-6 days of continuous care.

Does fin rot hurt fish?

Your infected fish may have fins that appear to be torn and ragged, as if they are rotting away. The fin rot may also cause your fish to become discolored and lethargic. If fin rot is not treated properly, it can lead to permanent damage on your fish’s fins and be fatal for your fish.

Is tail rot contagious?

The foremost thing to consider is to remove the fish which are infected from the tank community, as fin rot is not a common disease, but a contagious one.

How can you tell the difference between fin rot and fin damage?

Fin loss is caused by physical damage incurred by sharp tank decorations, snagged fins, or nipping from other fish. It happens when something actually tears the fin tissue. Fin rot is the result of a bacterial infection, which leaves the fins tattered, bloody or blackened.

Do goldfish tails grow back?

Does fin rot hurt the fish?

Fin and Tail Rot is caused by several types of gram-negative bacteria and often occurs simultaneously with other diseases. Fin and Tail Rot can be difficult to cure, especially in the more advanced stages. If left untreated, it will eventually kill the diseased fish and infect all other fish in the aquarium.

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