close up view of fishes koi swimming in a small lake in the park

kohaku goshiki yamabuki ogon underwater koi showa pond goldfish orange tancho staring freshness otsuka oya pet izumiya rearing golden oriental garden submarine aquarium aquatic fin expressive environment carp black japanese kusui animal swim colorful asian red yagenji gold shiro japan submersion beautiful tosai nature water tail chinese vertebrate kaibutsukun fish