How Long Does It Take for Koi Eggs to Hatch?

Female koi, a domesticated, colorful type of the common carp, spread their eggs energetically on aquatic plants as they are laid. They provide no further parental care to the eggs. Newly hatched koi feed on microscopic plankton including rotifers, copepods and algae. After about a year, they begin to eat small invertebrates such as caddis flies, mollusks and crustaceans. Adult carp eat a wide variety of animal species along with plant tubers and seeds.