What is it when clear stuff discharge from a womens vagina that has a fishey odar?

A fishy odor is NEVER normal. It probably means you have a bacterial infection of some kind, but could also mean something like a sexually transmitted infection. This should ALWAYS be checked out by a doctor. A yeast infection doesn't have a fishy odor, it has a bready, yeasty odor, so that's not what it is.