Black on fins...

fiveiron

AC Members
Feb 24, 2006
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My little brother has this big fat fancy pearlscale type goldfish, i have brough tit back from near death because he is only 11 and has no idea how to take care of fish... it has been doing really well but is starting to get black on the tip of its rear fins... anyone have any idea what this could be..? ill try and get some pictures up soon.
 
Goldfish colors tend to change as they mature, the black could be natural coloration. Also perhaps it was always supposed to be there but was faded due to poor health. Does it look like some growth or just colored fins?
 
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