Photoshop - Clone

Create an image and add a layer. Clone function is selected

Details:
Yellow/Brown blended sand with specs of black

A dark blue/green, light blue/green sea and white/clear foam created from waves

A shell of sorts, which is white with small bits of orange/brown with a very few spots

Clone has removed the shell, however it is clear that the object has been removed using the clone tool, this is evident by the fact there is an uneven/non-natural line created when removing the object itself. To remove this it would be best to go over the line itself.

As evident by the above image the area has been smoothed out in an attempt to provide a more natural curve.