Biodiversity & Conservation

Neocrania anomala and Protanthea simplex on very sheltered circalittoral rock



Image Sue Scott - Circalittoral cliff face with dense brachiopods Neocrania anomala and Terebratulina retusa, the anemone Protanthea simplex and the ascidian Ciona intestinalis. Loch Duich, Highland. Image width ca 1 m.
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Distribution map

CR.LCR.BrAs.NeoPro recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)

  • EC_Habitats

Text page icon Habitat description

Map icon Distribution of biotope in Britain and Ireland Present in sea lochs along the west coast of Scotland although not the Western Isles. Also locally in the south and west of Ireland as the variable salinity sub-biotope SCR.NeoPro.CaTw.
National importance Uncommon

Text page icon Description of biotope

For a full description of this biotope including characterizing species, distribution, survey information and references visit JNCC

Deep rock (often vertical walls) in the landward basins of fjordic sea lochs often have dense Protanthea simplex growing on rock and tubes of Chaetopterus sp. and amongst Sabella pavonina. The underlying rock surfaces are covered with Neocrania anomala and large solitary ascidians such as Corella parallelogramma, Polycarpa pomaria, Ascidia mentula and Ascidia virginea are often present amongst the worm tubes. ROV records in Loch Duich from 60-160 m show a gradual change from the above to a community dominated by white Sabella and large numbers of Protula tubularia. (Information taken from the Marine Biotope Classification for Britain and Ireland, Version 97.06: Connor et al., 1997a, b).

Additional information icon Additional information

This review can be cited as follows:

Jackson, A. 2005. Neocrania anomala and Protanthea simplex on very sheltered circalittoral rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 25/11/2015]. Available from: <>