|Basic Information||Biotope classification||Ecology||Habitat
preferences and distribution||Species
composition||Sensitivity||Importance| Image Anon. - Arenicola
marina and synaptid holothurians in extremely shallow soft mud.
Image width ca 40 cm in foreground. Image copyright information
SS.SMu.IFiMu.Are recorded () and expected () distribution in
Britain and Ireland (see below) |Distribution of biotope in
Britain and Ireland||Restricted to the sheltered areas of sea
lochs and voes or lagoons in Shetland, Orkney and the Inner and
Outer Hebrides.| |National importance||Not available| For a full
description of this biotope including characterizing species,
distribution, survey information and references visit JNCC In
very shallow extremely sheltered very soft muds Arenicola marina
may form very conspicuous mounds and casts. At such sites, high
densities of synaptid holothurians such as Labidoplax media and
Leptosynapta bergensis occur. This biotope typically occurs in
waters shallower than about 5 m in sheltere