On Boracay in the province of Aklan, the island is surrounded by fine white sand that extends well into the shallows. And at about noon, when the sun is directly overhead, the light reflecting off these shallows can turn normally blue water into a stunning emerald green. But oh so briefly. And then it's a light blue again for the rest of the day.
Photography books often teach us to avoid the harsh contrasty light at high noon. Well, you'd miss this opportunity if you did. So don't stop shooting! Enjoy.