Solitary ascidians, including Ascidia mentula and Ciona intestinalis, on very sheltered circalittoral rock
|Within Vocab||Marine Habitat Classification for Britain and Ireland Version 97.06|
|Definition||Upper circalittoral, often vertical, bedrock and steep boulder slopes in generally sheltered conditions with little tidal flow and typically with Ascidia mentula and Ciona intestinalis. Brachiopods and/or Protanthea simplex found at some sites (where this biotope may occur above NeoPro for example) and sponges include small amounts of Esperiopsis fucorum, Suberites carnosus, Polymastia mamillaris and barnacles often frequent. Hydroids such as Halecium halecinum often present. The large ascidian Phallusia mammillata seems to occasionally occur in this biotope. Some of the Irish examples of this biotope have Corynactis in shallow water. In extreme shelter, but with perhaps slightly more tidal flow, a more species-rich biotope with solitary ascidians and more sponge (SubSoAs) is found.|
|Has Current Version||1|
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