It is just part of there natural growth. They can live to be very old so they may change a lot from when you first got them.
Koi fish are originated from Eastern Asia but they have also been found in China.
kio
The kio would be to big. But it would try to attack it. Then they will fight. Dont put bettas with other fish.
Igor Kio's birth name is Igor Emil'yevich Kio.
the Japanese kio fish/dragon, and butterflies are a couple of many transformation tats
Emil Kio was born in 1894.
Emil Kio died in 1965.
Shimoku Kio was born in 1974.
Kio University was created in 1946.
If you are asking how many eggs (ova) a Kio carp releases when spawning then the answer is many thousands.
Kio Matsumoto's birth name is Kioko Fujima.