Can Kisame breathe under water?


Can Kisame breathe under water? He's still a shark. He has lungs but those
things on his face are branchiae, right?




[Kisame](http://naruto.wikia.com/wiki/Kisame_Hoshigaki) having gills on parts
of his body means he is likely to be able to

> He has small, round, white eyes, 3 sets of curved facial markings under his
> eyes, **gills on his shoulders**

However I don't believe Kisame was ever shown being able to inherently breathe
underwater (somebody correct me if I am wrong), a majority of fans are
speculating that he is able to due this factor and his overall shark-like
appearance.

However, later on in the Shippuden series, Kisame is shown being able to
breathe underwater when fusing himself with his sword

> When fused with Samehada, he gains the ability to breathe underwater using
> gills which form on his neck

