| Name of region | Decreasing (Nº of stations) | Decreasing (%) | Increasing (Nº of stations) | Increasing (%) | No trend (Nº of stations) | No trend (%) | Total (Nº of stations) |
|---|---|---|---|---|---|---|---|
| Black Sea (38) | 4 | 10.53 | 3 | 7.89 | 31 | 81.58 | 38 |
| Aegean-Levantine Sea (2) | 2 | 100 | 2 | ||||
| Adriatic Sea (19) | 1 | 5.26 | 18 | 94.74 | 19 | ||
| Bay of Biscay and the Iberian Coast (13) | 2 | 15.38 | 11 | 84.62 | 13 | ||
| Celtic Seas (202) | 8 | 3.96 | 194 | 96.04 | 202 | ||
| Greater North Sea (215) | 71 | 33.02 | 12 | 5.58 | 132 | 61.4 | 215 |
| Baltic Sea (464) | 40 | 8.62 | 75 | 16.16 | 349 | 75.22 | 464 |