closeup of popular expensive colored koi fish aka nishikigoi carp varieties under rippling clear fresh water

abstract agriculture alive animal aqua aquarium aquatic background breed carp chinese culture cyprinus decorative domesticated ecosystem farming feeding feng fish flowing food freshwater habitat husbandry isolated japanese jewels koi landscaping legendary love lucky nature nishikigoi omnivores orient ornamental outdoors pattern pet pond pool product ripple rubrofuscus school shui species swimming vibrant water