The charm of photographing sunsets over the sea is unique. Sunsets over the sea are probably among the most photographed subjects, yet they always manage to be different. I really like the advice to not put your camera away as soon as the sun sets: the Blue Hour can offer completely different colors and create an even more tranquil and evocative atmosphere. In the end, as you say, every sunset is truly a unique moment that will never be repeated exactly the same way.