Horse mussel beds - Modiolus modiolus beds with hydroids and red seaweeds on tide-swept circalittoral mixed substrata (SNH WMS)

The Priority Marine Feature (PMF) list contains 81 habitats and species considered to be of conservation importance in Scotland's seas. It includes many features which are characteristic of the Scottish marine environment, ranging from flame shell beds in coastal waters, to cold-water coral reefs of the deeper seas, and mobile species such as minke whale and basking shark.

This layer shows the distribution of Horse mussel (Modiolus modiolus) beds with hydroids and red seaweeds on tide swept circalittoral mixed substrata. They are found on the open coast and in tide-swept channels between 5-50m depth. The mussel beds support a diverse range of red seaweeds, sea firs, tube worms, molluscs and sea anemones. Recorded from Shetland, Orkney, the Hebrides and west coast sea lochs, the majority of records are from Scotland.