As mentioned, creativity is one of the most important qualities that a photographer must have, and this certainly applies to David Dubile.
While at his time, most people will take pictures of tress and hills, and people or maybe sports and other natural things—they all set their camera on the ground, which is boring from the point of view of David.
What he did is to bring the camera with him underwater, and present photos of the marine life and other activities and beautiful scenes underwater. This idea was very new at that moment, and this is what makes him famous.