Hi, Im new to this site, but with my past experienced as a hobbyist to rare tropical fish and breed them.Koi or colored river carp, as i like to call them, spawn close to shore in a violent mating ritual, in which the female bloated with eggs is rammed repeatedly by the males into some plant life/rocks. she can die from this- also unless you have spawning mops, a way to immedicaly seperate the eggs the parents will eat them immedally after laying.:-( most koi babys are born with problems/birth defects which is why the parents lay so many eggs. Also simply put there are to many koi in this world- most of which will die stunted in tanks/ponds not big enough for there edventual size. :roll:
the females are bigger then the males and are rounder when filled with roe. the males are smaller
Koi grow much to large for most ponds( under a few thousand gallons). think river size colored carp- koi can grow to be almost 5 feet.