| Subregions | Decreasing (Nº of stations) | Decreasing (%) | No trend (Nº of stations) | No trend (%) | Increasing (Nº of stations) | Increasing (%) | Total (Nº of stations) |
|---|---|---|---|---|---|---|---|
| Black Sea (38) | 3 | 7.89 | 21 | 55.26 | 14 | 36.84 | 38 |
| Aegean-Levantine Sea (2) | 2 | 100 | 2 | ||||
| Adriatic Sea (19) | 16 | 84.21 | 3 | 15.79 | 19 | ||
| Bay of Biscay and the Iberian Coast (13) | 12 | 92.31 | 1 | 7.69 | 13 | ||
| Celtic Seas (210) | 13 | 6.19 | 197 | 93.81 | 210 | ||
| Greater North Sea (230) | 60 | 26.09 | 169 | 73.48 | 1 | 0.43 | 230 |
| Baltic Sea (471) | 114 | 24.2 | 351 | 74.52 | 6 | 1.27 | 471 |