Slieve Na Griddle MCZ

Status: Proposed


Site overview

This is an offshore site measuring 58 km2 located in the western Irish Sea, between Northern Ireland territorial waters to the west and the Isle of Man territorial waters to the east. The site is very important because it is really deep and has a muddy seabed, which provides a home for lots of different types of worms. Larger animals then feed on these. Sponges, starfish, crabs and lobsters also call this area home. Sea-pens can be found in the soft sediment, and even basking sharks swim through during the summer months.

At risk This site is at risk, it currently is not designated as a Marine Protected Area - but should be. Decision makers in England will determine in 2018 if this site should be protected, make sure your voice is heard. Take action to ensure this site becomes a properly protected area.

MPA Type

Marine Conservation Zone

Marine Conservation Zones (MCZs) are designated under UK legislation (Marine and Coastal Access Act 2009) and have been established around England, Wales and Northern Ireland to contribute to the UK MPA network protect a range of nationally important marine wildlife, habitats, geology and geomorphology, and can be designated anywhere in English and Welsh territorial and UK offshore waters.

Surface Area

58.66 km2 (22.65 mi.2)


34.62 km (21.51 mi.)

Did you know?…

Over 170 parliamentarians from across the political spectrum signed up to our Marine Charter calling for a network of ‘marine protected areas’ in UK Seas

To the shelf limits, Scotland has 61% of UK waters, of which 23% are now in existing or new ‘marine protected areas’

An area over 9 times the size of Wales is now in marine protected areas in the UK, but less than 1% is considered by MCS scientists to be well managed

Stop the plastic tide

Support our appeal to turn the tide on plastics.

Find out more