How do you know if your silver arowana is sick?

snapfish asked:


I have a silver arowana and I′m not sure if it is developing some kind of fungal infection. Maybe I just noticed now, there’s some blue green coloration on the top of its head, around mouth, and a little on fin. But it doesn’t look too far from its color so I′m not sure if it is just starting or what. It is eating and swimming so it seems healthy. Please help.

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