Coastal waters worldwide are experiencing a concerning decline in oxygen levels, posing significant threats to marine ecosystems and human livelihoods. The Baltic Sea serves as a prominent example, with the emergence of 'dead zones' characterized by oxygen-free environments and detrimental effects on marine life. To combat this crisis, experts like Prof. Dr. Andreas Oschlies and Prof. Dr. Caroline P. Slomp are leading the Global Ocean Oxygen Network (GO2NE) to investigate the causes and consequences of oxygen loss in oceans. Their recent exploration of artificial oxygenation methods, published in the journal EOS, highlights the temporary nature of such interventions and the necessity of addressing underlying issues like excessive nutrient inputs and water temperature rise. While techniques like air or oxygen injection and oxygen-rich water pumping have shown localized success, discontinuation often leads to a rapid return of oxygen depletion. Moreover, these methods come with ecological risks such as methane release and habitat disturbance. The potential use of oxygen from green hydrogen production for coastal oxygenation is noted, but experts emphasize the importance of comprehensive water protection strategies and environmental monitoring. The study concludes that while oxygenation strategies can offer short-term relief, they are not substitutes for holistic climate protection and the reduction of nutrient pollution. By acknowledging the complexities of coastal oxygen depletion and advocating for a multifaceted approach, researchers aim to safeguard marine ecosystems and mitigate the worst impacts of oxygen deficiency in the long term.