Nope, lightning is absorbed by the water dome much like how
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. If Kisame could be electrocuted so easily, Killer Bee could have disposed of him low difficulty considering the fact that Killer Bee is a raiton user. Raiton is made of chakra so it is easily absorbed. Once Kisame has absorbed it, the 3rd Raikage won't be that fast and Kisame could simply drown him.
The 3rd Raikage can't swim out because his
body is made of metal so he'll be to dense and sink to the bottom.
Kisame wins mid difficulty, he is a bad match up for the 3rd Raikage.