Scene out of bounds on autorotate (Portrait orientation)

I am a Unity newbiew (not a C# newbie). I just created a simple scene with a water background (and coral objects in background) a couple fishes running around the screen. I created a build for Android with "Autorotate" as default setting.

My understanding was the Unity will automatically fit the scene into the landscape orientation [thats how it seemed in Unity Remote], however, when I download and install the apk file, the scene doesnt get scaled instead I see only a part of screen in the landscape orientation and the rest of the scene is out of bounds.

I am sure I am doing something wrong, but not sure what, any guidance will be great.

Thanks

Unity version 5.1.1f1 Using Mac Target device Samsung Galaxy S4

Please let me know if any other information is needed.

Thanks