Which Disease?

[StartingATank]

So, I was curious, if everybody had to pick a disease in marine fish, which would you want the least?

 

[StartingATank]

I'll start off. I would never want to get velvet in my aquarium. I assume everybody's reply would be the same, unless there is another disease I don't know about.

 

[Jay Hemdal Verified Community Expert]

I'll start off. I would never want to get velvet in my aquarium. I assume everybody's reply would be the same, unless there is another disease I don't know about.

True velvet, (Amyloodinium) is fairly rare, but left untreated, it is certainly the most deadly to the fish. The initial symptom (rapid breathing), is very often missed by aquarists, resulting in massive fish loss in a few days. Caught early enough, copper works well against it though.