Slieve Na Griddle

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 2017 if this site should be protected, make sure your voice is heard. Take action to ensure this site becomes a properly protected area.

Designation Status
Last Updated
6 June 2017
MPA Type
Marine Conservation Zone
MPA Purpose
to protect nationally important marine wildlife, habitats, geology and geomorphology


54° 10' 31" North,
5° 11' 2" West

Surface Area

58.66 km2
(22.65 mi.2 )


34.62 km
(21.51 mi.)

Iconic features protected by this site