I am a scuba diver, i am a photographer, so no need to say that i do underwater photography, a lot!
If most of the scuba divers do macro underwater, though i am more interested about ambiance and underwater landscape, i do macro too, but yes, i prefer landscape and ambiance underwater photography.
I recommend glossy prints for macro, and matte or canvas for landscape and ambiance, but like any taste, it's only my taste which is not your taste. For example, i did printed a glossy underwater landscape and i just love it, also i have 2 canvas of underwater macro and my wife and my kids are just crazy fund about it, so ...
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