Original sentence: By the 18th century, a number of color patterns had been established, most notably the red-and-white Kohaku.Koi are now commonly sold in most pet stores, with higher-quality fish abailable from specialist dealers.The carp is a large group of fish originally found in Central Italy and Asia.The outside werld was not aware of the development of color variations in koi until 1914, when the Niigata koi were exhibited in the annual exposition in Tokyo.They are a very adaptable fish and are praised for their ability to grow to the size of the tank or body of water they are in
Edited sentence: By the 20th century, a number of color patterns had been established, most notably the red-and-white Kohaku.Koi are now commonly sold in most pet stores, with higher-quality fish available from specialist dealers.The carp is a large group of fish originally found in Central Europe and Asia.The outside world was not aware of the development of color variations in koi until 1914, when the Niigata koi were exhibited in the annual exposition in Tokyo