"If it was a permanent lake, I'm sure they'd enjoy it! But once it's gone, they'll have to deal with the damage we've done to the ground itself."

Which was pretty impressive, if Kisame did say so, and there were enough who worked with earth and stone in the clan that Kisame knew a bit about how tedious and troublesome repairing damaged ground could be. But he didn't say more and just followed Sephiroth.