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Old 05-12-2003, 10:30 AM   #1
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goldfish developing black marks on dorsal fin

her fin was previously clear of any marks-- just all bright orange. is this new black signs of sickness?

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Old 05-16-2003, 08:24 PM   #2
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No, probably just a color change. Comets come in three colors, usually. Brown, orange and white. They may start out several different colors, but they will end up one of the three. Most likely it is simply changing colors due to some environmental factor.
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Old 05-18-2003, 06:46 PM   #3
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No, probably just a color change. Comets come in three colors, usually. Brown, orange and white. They may start out several different colors, but they will end up one of the three. Most likely it is simply changing colors due to some environmental factor.
I mostly agree with this, but it could be a Shibunkin, which can stay multi-colored throughtout life. Some of my pond fish have turned a solid color after a while, others stay mulicolored. The development of black or brown along the dorsal fin is a common thing that I see in my fish as they grow up.
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