Those photographs are amazingly beautiful. Wow. Does anyone know what the really bright blue bits are?
I too was thinking the turquoise bits are shallows where the sunlight is reflecting off the sandy and corally bottom in crystal clear tropical locations, Lake Victoria in Africa really leaps out. But then again so does the English Channel if one looks closely so I really don't know. But saying that the sea off Brighton beach did look real fine and gloriously blue on the way to work this morning.:)