Quote Originally Posted by Yukimura
Have you seen that guy's face, eyes, and teeth? There has to be something unnatural about him for him to look like that. However if Zabuza and Suigetsu are any indication there might some standard process that all the Mist ninja's go though through that distorts their bodies and makes them more 'fishy'.
Well, but so far the fishy-ness hasn't given Kisame any distinguished strengths that ordinary ninjas wouldn't possess.