What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?

Explanation

The aquatic organisms use the oxygen dissolved in water for carrying out respiration. The amount of oxygen dissolved in water is, however, limited. The terrestrial organisms take oxygen from air which contains much higher amount of oxygen. Thus, a terrestrial organism has an advantage over an aquatic organism in regard to obtaining oxygen because it is surrounded by an oxygen-rich air from which it can take any amount of oxygen.