yellow koi color change. - Betta Fish and Betta Fish Care
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post #1 of 4 (permalink) Old 07-03-2018, 11:50 PM Thread Starter
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yellow koi color change.

Hello, everyone. This is my first post here, so I hope I am doing it right.

I purchased a yellow koi from petco one week ago. My first betta since having a veiltail in college over 30 years ago! When I bought him he had only yellow and black markings. I noticed over the last couple of days that he is developing blue streaks in his tail and dorsal fins. Is he actually a "galaxy" koi? And can I expect the blue areas to spread?
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post #2 of 4 (permalink) Old 07-04-2018, 01:07 AM
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From everything I've researched, true Koi Betta cannot have any blue; just yellow, orange, red and/or black mostly on a flesh-colored body like Koi Goldfish. Unfortunately, people and stores that sell Betta have glommed onto color and patterns without reading the definition and mis-identify so many Betta. "Galaxy" is a trade name made up by people who thought scattered iridescent scales looked like a galaxy at night. So "Galaxy" Betta have scattered iridescent scales over the body.

I would say your gorgeous boy is going to marble. I love marbles because they are ever-changing. I even named one of mine "Random."

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Last edited by RussellTheShihTzu; 07-04-2018 at 01:17 AM. Reason: Typo
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post #3 of 4 (permalink) Old 07-04-2018, 11:44 AM Thread Starter
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So should I expect him to turn completely blue, or some combination of yellow and blue?

Last edited by Petmum; 07-04-2018 at 11:52 AM.
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post #4 of 4 (permalink) Old 07-04-2018, 03:07 PM
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Never completely blue most likely, they change their patterns, but usually don't become solid colored.

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