Sunshine and a friend is ok, I think daylight and a friend is better, the image setting later in the day when the sun is low will have less harsh shadows, the fringing is often caused with some lenses and strong contrasting light, the sunlight is reflecting off the sand in your example causing the high contrast fringing.
There youtube and plenty of natural lighting tutorials on the web, a bit of research will be a good idea.
One of mine on Removing Purple
Fringing in PhotoshopDavid