Scuba diver blowing bubble rings. As the escaping air rises to surface, the decrease in pressure causes the rings of air to expand.

breathing exhaling floating underwater diving scuba diving working mature adult 40s adult 45 50 years male men mature men middle aged man relaxation submerged 1 person geometric circle top half three quarter length vertical colour image photography point of view high angle view scuba mask diving equipment diving mask work tool weights plumb weight belt sports clothing protective sportswear wetsuit ocean floor bubble sand flowing water ocean underwater leisure nature marine life wildlife man breathing out underwater air bubble air rings atmospheric pressure underwater pressure exhaling air bubbles pressure air pressure underwater photography