Fruit in secondary--rotting fruit?

Last week(8 days ago), I transferred a mead to 2 secondary glass carboys. I had to use 2 carboys, a 5 gallon and 3 gallon, due to adding 18 lbs of strawberries and 4 pounds of bananas.

There is about 6 inches of headspace in each carboy. The fruit on the top of the mead is turning a light brown color, which I would expect. My question is do I have to worry about the fruit rotting on the top of the mead or is it ok due to the high alcohol percentage?

You can do what they call "punching the cap down" - which basically means to push the fruit back down into the liquid.

Also, 6 inches of head room in the secondary is a little high. Top off if you can.