For a non-photographer beginner diver, prioritize simplicity, safe operation underwater, and realistic expectations about image quality.

A GoPro is generally better suited to easy video than still photography. It’s designed more as a “turn it on and forget it” camera, which can be a good fit for a novice diver who should not be distracted by controls. But for stills, framing and shutter use are less convenient, and older GoPro underwater housings with domed fronts can cause blurry images underwater; a flat-lens housing is preferred.

A compact camera in a housing is the better choice if still photos matter more. It will usually be easier to aim and more photo-oriented than a GoPro.

Also, underwater color is a major issue: as depth increases, photos and video lose reds and warm tones, turning blue/green. Without lights, filters, or underwater white-balance options, results may look disappointing. Even clear water has this problem.

So: choose a GoPro if simplicity and casual video matter most; choose a compact in housing if still images matter most. In either case, look for a proper underwater housing, easy controls, and some way to handle underwater color.