| Type | Ecological phenomenon |
| Cause | Unsustainable extraction of marine resources |
| Timeline | Depletion of global fisheries by mid-21st century |
| Consequence | Food shortages • Economic instability • Biodiversity loss • Disrupted marine ecosystems • Climate change |
| Policy changes | Restoration of marine habitats • Promotion of sustainable fishing practices • Enforcement of regulations and conservation efforts |
| Sustainable alternatives | Seaweed farming • Plant-based proteins • Alternative protein sources |
