Evening primrose oil takers - is it supposed to smell really rancid fishy gross?

I really badly want to try taking this but I bought a bottle and smelled the inside of the bottle after opening it and was so grossed out I chickened out and could never bring myself to take them. Eventually I threw them out. I am thinking about buying them again to look past the smell but only if anyone can reassure me that it's normal or tell me I got a bad batch? I was to scared i'ed end up really sick or something because they were rancid. Please share!