Sabellaria spinulosa reefs
2019 Draft WG/WG SMMNR Towed Video Survey North West Anglesey & Pembrokeshire
Mixed cobbles, pebbles and sandy sediment
Moderate quality video. Mixed cobbles, pebbles and sandy sediment with patches of Sabellaria spinulosa reef, tube worms and scour tolerant bryozoans. Video largely stationary on the seabed for 58 secs at a depth of 53.7m bsl. 5 still images taken.

Sabellaria spinulosa reefs
2019 Draft WG/WG SMMNR Towed Video Survey North West Anglesey & Pembrokeshire
Mixed cobbles, pebbles and sandy sediment
Moderate quality video. Mixed cobbles, pebbles and sandy sediment with Sabellaria spinulosa reef, tube worms and scour tolerant hydroids and bryozoans. Sabellaria spinulosa reef partially obscuring substrata. Sabellaria reef: elevation medium; patchiness high. Video largely stationary on seabed for 1 min 57 secs at a depth of 48.1m bsl. 4 still images taken.Substrata: Gravel 20%; Sand 20%; Mud 10%; Sabellaria reef 50%.

Sabellaria spinulosa reefs
2019 Draft WG/WG SMMNR Towed Video Survey North West Anglesey & Pembrokeshire
Mixed cobbles, pebbles and sandy sediment
Moderate quality video. Mixed cobbles, pebbles and sandy sediment with patches of Sabellaria spinulosa reef, tube worms and scour tolerant hydroids and bryozoans. Video largely stationary on seabed for 1 min 16 secs at a depth of 46.1m bsl. 3 still images taken.

Moderate quality video. Mixed cobbles, pebbles and sandy sediment with patches of Sabellaria spinulosa reef, tube worms and scour tolerant bryozoans and hydroids. Sabellaria reef: elevation low; patchiness low . Video largely stationary on seabed for 2 min 31 secs at a depth of 45.6m bsl. 6 still images taken.

Mixed cobbles, pebbles and sandy sediment with Sabellaria spinulosa reef
Moderate quality video. Mixed cobbles, pebbles and sandy sediment with Sabellaria spinulosa reef, tube worms, Didemnum maculosum and scour tolerant hydroids and bryozoans. Sabellaria reef: elevation medium; patchiness medium. Video largely stationary on seabed for 4 min 14 secs at a depth of 47.2m bsl. 5 still images taken.

Moderate quality video. Sabellaria spinulosa reef (substrata unknown), Sabellaria reef obscuring substrata. Sabellaria reef: elevation medium; patchiness high. Video largely stationary on seabed for 1 min 16 secs at a depth of 47.9m bsl. 3 still images taken.

Moderate quality video. Mixed cobbles, pebbles and sandy sediment with patches of Sabellaria spinulosa reef, tube worms and scour tolerant hydroids and bryozoans. Sabellaria reef: elevation medium; patchiness medium. Video largely stationary on seabed for 2 min 7 secs at a depth of 46.9m bsl. 3 still images taken.

Poor quality video. Sabellaria spinulosa reef (substrata unknown). Sabellaria reef: elevation medium; patchiness low. Video largely stationary on seabed for 1 min 25 secs at a depth of 48.2m bsl. 1 still image taken.

Moderate quality video. Mixed cobbles, pebbles and sandy sediment with patches of Sabellaria spinulosa reef, tube worms and scour tolerant hydroids and bryozoans. Sabellaria reef: elevation medium; patchiness low. Video largely stationary on seabed for 1 min 38 secs at a depth of 49.4m bsl. 5 still images taken.

2019 Draft NRW Northwest Angelsey Drumlin Survey
Circalittoral mixed sediment and mobile sand
Circalittoral mosaic of mobile, medium rippled sand with Sabellaria spinulosa reef, boulders, cobbles and mixed sediment with Sabellaria crusts at 54-64m BSL. Faunal turf of hydroids and bryozoa and an understorey of solitary tunicates. Section 7/OSPAR habitats & species: medium quality Sabellaria spinulosa. Reef elevation categories and abundance (SACFOR): crusts present: C. S. spinulosa reef >5<10cm. 147m2 cover 5%. Litter & other impacts: none. INNS: none recorded. Assessment based on 147.3

2016 NRW towed video survey North Angelsey INNS & Sabellaria
Circalittoral mixed sediment with Sabellaria spinulosa
Circalittoral mixed sediment of pebbles, shell gravel and mud at 77-84m BSL with Sabellaria spinulosa reef. Varied fauna in low abundance. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): <5cm: F & 5-10cm: C; Reef extent (m2): 270; &

2016 NRW towed video survey North Angelsey INNS & Sabellaria
Circalittoral coarse sediment, stony reef & Sabellaria reef
Circalittoral mosaic of coarse sediment of pebbles and shell at 54m BSL, Sabellaria spinulosa reef and outcrops of bedrock and boulders. Fauna of hydroids and crustacea. Taxon density estimates a minimum. Sabellaria spinulosa reef elevation categories and

2016 NRW towed video survey North Angelsey INNS & Sabellaria
Circalittoral sand with Sabellaria spinulosa reef
Circalittoral sand and bedrock at 49-55m BSL with Sabellaria spinulosa reef. Fauna of hydroids. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): <5cm: F & >10cm: C; Reef extent (m2): 22.5; & Reef patchiness (% cover): 30%. Biotope fi

Circalittoral sand with Sabellaria spinulosa reef
Circalittoral mosaic of sand with Sabellaria spinulosa reef and bedrock at 50m BSL with Sabellaria crusts. Fauna of hydroids. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): <5cm: O & 5-10cm: F; Reef extent (m2): 84.5; & Reef patchi

Circalittoral coarse sediment & sand with Sabellaria spinulosa reef
Circalittoral mobile medium rippled sand over pebbles and cobbles at 23.5m BSL with substantial Sabellaria spinulosa reef. Sparse fauna of hydroids, crustacea and anemones. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): <5cm: O & >

Circalittoral coarse sediment & sand with Sabellaria spinulosa reef.
Circalittoral coarse sediment of pebbles with slightly silty mobile medium sand at 25m BSL. Fauna of hydroids and crustacea and substantial Sabellaria reef. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): <5cm: O & >10cm: A; Reef ex

Circalittoral coarse sediment with Sabellaria spinulosa reef
Circalittoral coarse sediment of gravel and coarse sand at 24m BSL with Sabellaria spinulosa reef. A brief area with small boulders and cobbles. Fauna of crustacea, bryozoa and hydroids. Sabellaria spinulosa reef elevation categories and abundance (SACFOR

Circalittoral Sabellaria spinulosa reef on coarse sediment
Circalittoral Sabellaria spinulosa reef (much toppled) on coarse sediment alternating with pebbles and sand with hydroids and crustacea at 22m BSL. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): >10cm: S; Reef extent (m2): 59; & Re

Circalittoral coarse sediment with mobile sand & Sabellaria spinulosa reef
Circalittoral mosaic of coarse sediment of pebbles at 24m BSL with Sabellaria spinulosa crust and waves of mobile medium sand between tall stands of Sabellaria spinulosa reef. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): <5cm: C

Circalittoral coarse sediment with Sabellaria spinulosa reef
Circalittoral coarse sediment of pebbles and gravel at 32m BSL with Sabellaria spinulosa reef. Fauna of crustacea and anemones. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): >10cm: S; Reef extent (m2): 38.5; & Reef patchiness (% c

Circalittoral coarse sediment with Sabellaria spinulosa reef
Circalittoral coarse sediment of pebbles and gravel at 30m BSL with Sabellaria spinulosa reef. Fauna of crustacea and anemones. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): <5cm: F & >10cm: A; Reef extent (m2): 66; & Reef patchi

Circalittoral coarse sediment with Sabellaria spinosa
Circalittoral coarse sandy sediment with Sabellaria reef 29m BSL. Fauna of encrusting sponges, hydroids, anemones and crustacea. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): 5-10cm: S; Reef extent (m2): 80; & Reef patchiness (% c

Low stony reef with Sabellaria spinulosa
Circalittoral low stony reef of cobbles and pebbles and scattered boulders at 28-37m BSL with Sabellaria spinulosa reef, hydroids, crustacea and sponge crusts. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): 5-10cm: A & >10cm: A; Re

Circalittoral coarse sediment of pebbles and gravel at 27m BSL with Sabellaria spinulosa reef. Fauna of crustacea, sponge cushions and hydroids. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): 5-10cm: A & >10cm: A; Reef extent (m2):

Circalittoral coarse sediment with Sabellaria spinosa
Circalittoral broken Sabellaria spinulosa reef over pebbles, whole dead shell, gravel and sandy sediment. At 46m BSL Fauna of crustacea, Urticina, Flustra and encrusting sponges. Small area of packed dead Modiolus shell and small boulders. Sabellaria spin

Circalittoral coarse sediment with Sabellaria spinosa
Circalittoral mosaic of coarse sediment of compacted pebbles and Modiolus shell with little fauna evident and Sabellaria reef with crustacea and anemones at 48m BSL. Sabellaria spinulosa reef elevation categories and abundance (SACFOR): <5cm: A; Reef exte

Circalittoral stony reef with Sabellaria & Molgula turf
Circalittoral stony reef of cobbles in a matrix of stone gravel and pebbles with an extensive turf (50% cover) of Molgula and Sabellaria spinulosa and sponges at 34m BSL. Other fauna diverse but sparse. Sabellaria spinulosa reef elevation categories and a

2015 NRW Rhiannon Modiolus Towed Video Survey, north of Anglesey
Sabellaria spinulosa reef on mixed sediment
Sabellaria spinulosa reef on mixed sediment (underlying subtrata not visible) with diverse fauna dominated by hydroids and bryozoans.

2005 Seasearch survey of North Llyn Peninsula, North Wales
Circalittoral cobbles and a few pebbles with medium coarse sand between. Dense crust of Sabellaria spinulosa over the cobbles froming low reef-like encrustaceans with encrusting olonial ascidians over the cobbles. Other sessile and mobile fauna inludi