Table 5. Summary of the major threats to marine biodiversity in different areas reported by the regions (Table 1).
| Overfishing | Habitat loss | Pollution | Alien species | Temperature | Hypoxia | Acidification | Total | Median | |
| Mediterranean | 5 | 5 | 4 | 5 | 5 | 2 | 1 | 27 | 5.0 |
| Gulf of Mexico | 5 | 5 | 5 | 4 | 2 | 3 | 1 | 25 | 4.0 |
| China | 5 | 5 | 5 | 2 | 2 | 3 | 1 | 23 | 3.0 |
| Baltic | 4 | 3 | 4 | 3 | 4 | 3 | 1 | 22 | 3.0 |
| Caribbean | 4 | 4 | 4 | 4 | 2 | 2 | 2 | 22 | 4.0 |
| USA Southeast | 4 | 4 | 3 | 3 | 3 | 2 | 3 | 22 | 3.0 |
| Brazil and Tropical West Atlantic | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 22 | 3.0 |
| Humboldt Current and Patagonian Shelf | 4 | 3 | 3 | 3 | 2 | 4 | 2 | 21 | 3.0 |
| North Indian Ocean | 3 | 4 | 4 | 3 | 3 | 2 | 2 | 21 | 3.0 |
| Tropical East Pacific | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 20 | 3.0 |
| South Africa | 3 | 2 | 4 | 4 | 2 | 4 | 1 | 20 | 3.0 |
| New Zealand | 4 | 3 | 2 | 4 | 2 | 1 | 3 | 19 | 3.0 |
| Atlantic Europe | 4 | 2 | 4 | 2 | 4 | 1 | 2 | 19 | 2.0 |
| USA Northeast | 4 | 3 | 3 | 2 | 3 | 2 | 1 | 18 | 3.0 |
| Japan | 3 | 3 | 3 | 2 | 3 | 1 | 2 | 17 | 3.0 |
| Canada (all) | 2 | 4 | 2 | 2 | 5 | 0 | 1 | 16 | 2.0 |
| Australia | 3 | 3 | 2 | 3 | 2 | 0 | 1 | 14 | 2.0 |
| Antarctica | 2 | 2 | 2 | 0 | 1 | 0 | 2 | 9 | 2.0 |
| Total | 66 | 62 | 60 | 52 | 51 | 36 | 30 | ||
| Median | 4.0 | 3.0 | 3.0 | 3.0 | 3.0 | 2.0 | 2.0 |
Each threat was scored from 1 to 5 (minimum to maximum) across a comparative scale among different regions. Some regions (e.g., Australia) reported only known threats rather than predicted threats. Table is sorted by reported greatest threats and areas with greatest impacts. Median values of each threat and for each region are also reported.