Hi,

I have recently bough 6 Zebra Danios and noticed immediately after
putting then in the tank one of them has no stripes from about 2/3 down
its body to the end of the tail and also appears to have red gills.
However, he seems fine and very active and is eating. He is showing no
signs of ill health at all. I have purchased them from a specialist
store and have not had any problems from any other of their fish.

Is this something I should be worrying about?

I testing the tank before and a few days after adding the fish and
everything is fine.

Next time I will pay closer attention to what's in the bag before I
pay.

Thanks for any advice

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