Underwater photography can also be categorized as an art form and a method for recording data. Successful underwater imaging is usually done with specialized equipment and techniques and a sense of poetry.
While it's perfectly possible to get some great snaps while freediving and snorkeling, expert underwater photographers know that the only sure-fire approach is to shoot while scuba diving. Scuba allows you to control your buoyancy and to hover motionless in the water. You can carefully control your position from your subject, and you can take your time. Freediving allows you none of these advantages. Any pictures you take will be rushed and taken while moving.
Scuba diving is a skill that takes time to master. Beginning divers often have enough to think about while working to control their buoyancy and their movements, along with learning to monitor their air consumption and how to deal with unfamiliar equipment. Even if your goal is only to do photography, it's worth making several training and practice dives until you feel entirely comfortable.
Underwater images are harder to take than their land counterparts for several reasons. For one, there is less light below the surface of the water. The deeper one dives, the less light penetrates. Even at relatively shallow depths of around 10 feet, much of the red wavelengths of light have been absorbed. Each color fades out slowly until only blue light reaches dimly at more than 100 feet. Without adding some extra light, your images will lack the color you expect.
Take a look at the beautiful shots our artists were able to take.