East of Celtic Deep recommended Marine Conservation Zone

Status: Potential T3 site

Anemone (Credit Amy Lewis)Anemone (Credit Amy Lewis)

Large numbers of anemones and hermit crabs dominate the shallow waters here.

Burrowing worms and bivalve molluscs make their homes in subtidal sand and mud.


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The East of Celtic Deep recommended MCZ is located 40km south of the Pembrokeshire coast in Wales.

Subtidal sand and mud provides habitats for an abundance of marine species here. Many of which are critical in the functioning of the marine ecosystem, such as burrowing worms and bivalve molluscs. Large numbers of anemones and hermit crabs have been observed dominating the shallower waters of the area.

Frontal systems which occur here give rise to a highly productive area during the summer months. This increase in food supply attracts a significant number of whales, common dolphins and seabirds. Outside of summer the area remains particularly important for wintering birds.

Although proposed for designation in the 2013 Defra consultation, this site is now on hold. The proposal to designate this site will be reviewed in light of further developments in the devolution of UK waters. We will continue to reinforce the need for an ecologically coherent network of Marine Protected Areas, which includes the need for sites to be designated in Welsh Offshore waters. 

Contains UKHO Law of the Sea data. Crown copyright and database right and contains Ordnance Survey Data Crown copyright and database 2012

Other nearby sites:

Celtic Deep


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