Actually, I don't think Kisame knows he's Madara.Madara hi himself after establishing Akatsuki.. Now de activities of akatsuki r started n they even loss sasori so i thnk madara as tobi acted foolishly so tht other members dont no his true identity but itachi is de 1st 2 now the pein n kohan n Zetsu at last kisame no tht tobi was madara himself....
so obviously sasori,deidara,hidan n kakuzu dont no tht tobi was madara
In the manga he saysActually, I don't think Kisame knows he's Madara.
He merely knows that he's the former Mizukage of Hidden Mist.
I'm not sure if he's been informed that he's ACTUALLY Uchiha Madara.
Ahh, yea, your right.In the manga he says
"It will be a lot easier for me to work now youre pulling the strings...mizukage...or should i say, madara.
Yes it appears it was zetsu, but still, zetsu and him appear to have known each other for a long time considering how they worked together with the whole itachi thing...zetsu is in the top tier of akatsuki.