Yes, the organization I work for studies this phenomenon extensively. We measure pH, temperature, oxygen, flow, and many other factors related to ocean health, and over time, climate change. Hypoxia (and acidification) are emerging concerns.

Article: https://tula.org/news/hypoxia-emerges-as-a-new-threat-on-can...

Research: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GB00...