H.A.
My mother always used to cut a potato (I know, it sounds weird) and put it in a bowl on top of the stove while the fish was cooking, and after putting the trash outside (right after eating) and then she always lit a scented candle and I honestly don't ever remember smelling a "fishy" smell in the kitchen. (My husband is the same way about tuna, so I usually don't eat it unless he's going to be gone for a few days for work...) Good Luck!