Koi Betta Changing Color? Question

Discussion in 'Betta Fish' started by BettytheBetta1, Apr 18, 2019.

  1. BettytheBetta1New MemberMember

    I bought a female koi betta a week ago, and it had suddenly changed color from white to black. Is this normal? I didn’t know that could happen.
     
  2. RepolieWell Known MemberMember

    Yes that's perfectly normal. Koi bettas have the marble gene which allows them to change colours over time.
     
  3. FanaticFishlore VIPMember

    We have a koi betta that was completely white with translucent fins upon purchase, now he's a dark red and black with specks of blue, marble bettas will change color throughout their life.
     
  4. DemeterFishlore VIPMember

    I want pictures! Yes koi bettas are technically marbled and therefor they usually change colors over time. I've also had white fish turn black and even blue fish turn solid white.
     
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