Koi Amur carp breed fish swimming in Chinese garden in Ruhr University Bochum

koi amur carp breed fish swimming chinese garden ruhr university bochum color swim lake aquatic prosperous nishikigoi underwater animal background environment outdoor orange water pool koi ponds fins koi pond golden fish ternak wildlife group koi carp golden top japanese view amur carp goldfish yellow fish nobody no people above outside real time peaceful calm relax