|EC Habitats Directive
||Phymatolithon calcareum and Lithothamnion
corallioides are listed on the EC Habitats Directive Annex Vb. Sites for maerl beds
can be designated as the Annex I habitat Sandbanks slightly covered by seawater all of
the time, occur within Large shallow inlets and bays and may be present
in some (Scottish) Lagoons.