Is this fungus?

Leeman75

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These Black Neon Tetras are about 5-6 weeks in my tank. It's a planted tank that's been running very healthy for probably 4 years.

Only 2 or 3 have these have 1 or 2
white spots on them that seem to not be flat. They're swimming and eating normal. There are probably 15 other Black Neon Tetras, 2 Dwarf Flag Acaras, and a BN Pleco are all fine.

Temp 78, 0,0,20ish for ammonia, nitrites, nitrates. 50% WC weekly. 29 gallon.

Is this fungus or something else? Sorry for the poor pics. Tetras are hard to take pictures of.
20250906_101120.jpg20250906_101231.jpg20250906_101249.jpg20250906_101718.jpg20250906_101721.jpg
 

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I know it’s not easy but any chance of a very sharply focused image showing those bumps?

I assume the lighting is responsible for the pinkish colouring in these images but I don’t think I’ve seen anything quite like them before.
 

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I think you are dealing with a virus rather than a fungus.

I'm not seeing the fuzzy strands, which are usually associated with a fungus.

The lesions look to be individual small lumps, rather than irregular, patchy, fungal growth.
 
Are the spots increasing, decreasing or staying the same in numbers and size?

Did you notice when the fish were purchased or have they developed since?

Are the spots opaque or transparent. If transparent can you see inside them and if so what do you see inside the spot?

Would you say the spots are in and above the skin or do they extend or come from below the skin?

Are the spots giving any kind of irritation that is shown by the behaviour of the fish?
 

Random Great Topic!

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