Scottish Shellfish Farm Production Survey 2025

Scottish Marine Regions

The Marine (Scotland) Act 2010 introduced integrated management of Scotland's seas. The creation of a National Marine Plan, as required by the Act, sets the wider context for planning within Scotland including what should be considered when creating regional marine plans. Eleven Scottish Marine Regions have been created under the Act (figure 4) which cover sea areas extending out to 12 nautical miles.

To support the development of Regional Marine Plans by Regional Marine Planning Partnerships, tonnages/shell numbers and financial values of annual shellfish production for common mussel and Pacific oysters have been calculated for the regions defined under the Act.

The map shows the boundaries and names of the Scottish Marine Regions established under the Marine (Scotland) Act 2010.

In order to maintain commercial confidentiality, common mussel production values for Argyll & Clyde, and the West Highlands, Moray Firth & the North Coast were merged. Similarly, Pacific oyster production for the West Highlands & the North Coast and Orkney Islands & Shetland Isles were also required to be merged.

Other shellfish species including native oyster (Argyll & Solway) and king scallop (Argyll & West Highlands) were produced, however, these figures cannot be attributed to Scottish Marine Regions due to commercial confidentiality. All Scotland data for Other shellfish species can be found in Data Source: Scottish Shellfish Farm Production Survey 2025, Supplementary Tables, Table 8.

The data for charts 15-18 can be found in Data Source: Scottish Shellfish Farm Production Survey 2024, Supplementary Tables, Tables 9 and 10.

Common mussel production (tonnes).

The chart shows annual common mussel production tonnage by Scottish Marine Region. For confidentiality reasons, production data for some regions are presented as merged regional groupings.

Common mussel production value in thousands (GBP).

The chart shows the annual value of common mussel production by Scottish Marine Region. For confidentiality reasons, production values for some regions are presented as merged regional groupings.

Pacific oyster production (number of shells in thousands).

The chart shows annual Pacific oyster production by Scottish Marine Region, measured in thousands of shells. For confidentiality reasons, production data for some regions are presented as merged regional groupings.

Pacific oyster production value in thousands (GBP).

The chart shows the annual value of Pacific oyster production by Scottish Marine Region. For confidentiality reasons, production values for some regions are presented as merged regional groupings.