| Name of region | Decreasing (Nº of stations) | Decreasing (%) | No trend (Nº of stations) | No trend (%) | Increasing (Nº of stations) | Increasing (%) | Total (Nº of stations) |
|---|---|---|---|---|---|---|---|
| Black Sea (3) | 3 | 100 | 3 | ||||
| Aegean-Levantine Sea (8) | 8 | 100 | 8 | ||||
| Adriatic Sea (11) | 11 | 100 | 11 | ||||
| Western Mediterranean Sea (13) | 12 | 92.31 | 1 | 7.69 | 13 | ||
| Bay of Biscay and the Iberian Coast (12) | 12 | 100 | 12 | ||||
| Celtic Seas (217) | 5 | 2.3 | 211 | 97.24 | 1 | 0.46 | 217 |
| Greater North Sea (169) | 59 | 34.91 | 105 | 62.13 | 5 | 2.96 | 169 |
| Baltic Sea (456) | 40 | 8.77 | 392 | 85.96 | 24 | 5.26 | 456 |