Why is mango mustard called mango in koi fish?
There are yellow-green markings similar to mangoes. According to the personal database, mustard koi fish is a golden variety in koi fish, and its body color is called mustard koi fish 1 as long as it has a little mustard color. Mango koi fish, a variety of mustard seed koi fish, is a new variety artificially cultivated through systematic breeding and mutation.