Photographer David Orias for shooting Californian waves uses slow shutter speeds, precision camera movement and rich light of dawn or dusk makes the rest. Result: magical, amazing images which makes Pacific Ocean looks like gold or even rainbow.
When Orias was asked about those magical pictures he said:
I often use the camera to see our world in ways our eyes cannot see. I do this by using long shutter speeds and camera motion to achieve this goal. I am often asked where the colors on my waves come from. I shoot mostly at dawn and the geography of the location allows higher ambient light levels before the full illumination by the sun. Colors are created by different weather conditions, amount of clouds or even smoke in the air from local wildfires which are often prevalent.