How can koi not die easily? how can koi distinguish between male and female?

The skin of the female carp is whiter and the abdomen is fuller and larger.

If the male carp, the hand fin, Gill cover appearance has a spot-like raised small object, you can feel it with your hands.

Male carps tend to be more alert when swimming, and when they are young, they become beautiful earlier, so they are easy to take part in the evaluation meeting when they are young.

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