- Fire(place)
- Ebb and flow of water at shorelines
- water droplets dropping
- winds
- storms
- fish swimming
By ambient, i mean something that is both stochastic and also sort of repetitive and something you could have happening in the background that is enjoyable in a furniture music/video kind of sense. You dont really pay attention to it but its good company that prevents deathly silence if that makes sense
In the waters around coral reefs I’ve always noticed a constant clicking/scraping nose. I was told as a kid that’s the sound of the coral polyps but I never really looked into it. Grew up snorkeling a whole lot in my home country and that was the first thing your post made me think of.
Old gf of mine told me the popping we heard snorkeling was parrotfish chipping coral. Made sense because we were near coral and our beaches (NW Florida) are pure white. YMMV according to geography.
https://old.reddit.com/r/scuba/comments/nionzq/do_you_ever_just_listen_to_the_sound_of_the_reef/