Koi Fish

Last day, I saw a japanese garden with a pond I amazed there's a a koi fish there. One of my classmates throwing a coin in a pond and make a wish . Then I try to do that also and make a wish, because i believe the old folks. But one of my classmates doesn't believed the old folks or sayings. Koi fish is from japan, a variety of the common carp(Cyprinus carpio). Koi has a special sensory cells to function as smell receptors. Koi have taste buds, have hearing system.