Saturday, February 26, 2011

Girl or Guy Fish?

How can you tell if it's a girl fish or a guy fish? - Maria

It usually takes two years for a Koi fry to be considered a mature "adult".  Before they are adults, both male and female Koi will look almost exactly the same.  After two years, you will notice these differences:

Male Koi:

  • will be smaller
  • have a cigar shaped body
  • fins will have a triangular shape
Female Koi:
  • will be larger
  • have a blimp shaped body (they get full of eggs)
  • fins will have a rounded shape

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