koi fish swimming in the aquarium, fancy carp fish

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