Glannau Penmon

Glannau Penmon - Biwmares

Site of Special Scientific Interest
Location within Wales
Location	West Gwynedd
Grid reference	SH6211778674
Coordinates	53°17′13″N 4°04′12″W / 53.287°N 4.070°W / 53.287; -4.070Coordinates: 53°17′13″N 4°04′12″W / 53.287°N 4.070°W / 53.287; -4.070
Interest	Biological and Geological
Area	170.87 hectares (422.2 acres)
Notification	1957

Glannau Penmon - Biwmares is a Site of Special Scientific Interest (or SSSI) in Anglesey, North Wales. It has been designated as a Site of Special Scientific Interest since January 1957 in an attempt to protect its fragile biological and geological elements.^[1] The site has an area of 170.87 hectares (422.2 acres) and is managed by Natural Resources Wales.

Type and features[]

This SSSI has been notified as being of both geological and biological importance and the following are considered to be of Special Scientific Interest:

1. Communities of animals and plants of mixed sediment and of muddy gravel shores.
2. Four communities of restricted national distribution:

• Piddocks burrowed into lower shore limestone overgrown with serrated wrack.
• Sponges, sea-squirts and serrated wrack on tide-swept lower shore rock.
• Sponges, sea-squirts, red seaweeds and serrated wrack found on a tideswept mixture of mud, sand, cobbles and pebbles.
• Lower shore muddy gravel inhabited by a diverse group of small marine

worms.
3. Two species-rich communities of marine plants and animals:

• Sponges, sea-squirts and sea-mats on bedrock overhangs.
• Serrated wrack and various animals under lower shore boulders.

4. A succession of ice-age sediments, exposed in the soft coastal cliffs and foreshore at Lleiniog

See also[]

• List of Sites of Special Scientific Interest in Isle of Anglesey

References[]

External links[]

• Natural Resources Wales website

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