| Number seen/Abundance | Date | Location | Comments | Recorded by |
|---|---|---|---|---|
| P | 2003-05-26 | Firestone Bay Firestone Bay, Plymouth, Devon |
Lots. | John Bleach |
| P | 2003-05-24 | Perranuthnoe Beach Perranuthnoe Beach, all along beach |
seen on beach, detached | Patricia Johnstone |
| P | 2003-06-25 | Trevone/Newstrain Beach - flat slate rock outcrop |
Lots, in nearly every rock pool investigated. | St Issey School Group |
| C | 2002-05-11 | Batten Bay, nr Plymouth |
Common in lower shore rock pool | BTCV/ MilleniumVolunteers |
| P | 2003-05-04 | Below the sea-front parking at New Polzeath in at least 2 pools on the rocky shore here near to the |
Attached. Two clumps seen. Currently relatively small clumps. | Peter Barfield |
| F | 2004-04-07 | Helford passage + Bar beach, Helford River, Cornwall. |
In low rockpools and on low sand flats | Ruth Williams |
| P | 2004-03-25 | Kircolm, Loch Ryan (Dumfries and Galloway) |
1st record of species in Scotland. Seen scattered along the shore. Variety of sizes seen. | Scottish Natural Heritage Surveyors |
| 100 indivi | 2004-03-25 | Cairnryan, Loch Ryan (Dumfries and Galloway) |
1st record of species in Scotland. Seen along 50m stretch of shore. Variety of sizes seen. Photos taken. | Scottish Natural Heritage Surveyors |
| P | 2004-03-25 | Salchrie, Loch Ryan (Dumfries and Galloway) |
1st record of species in Scotland. Seen scattered along the shore. Variety of sizes seen. | Scottish Natural Heritage Surveyors |
| O | 2004-05-08 | Jennycliff Bay, near Plymouth. Rocky shore, alongside sandy/gravelly beach. |
Occassional growing in small clumps in mid-shore pools | Seashore Safari |
| C | 2004-06-05 | Wembury Beach, South Hams, Devon. Rocky shore with some sandy patches |
Common, mid sized rafts in rockpools. high - low shore. | Seashore Safari |
| 20 | 2004-07-03 | Coombe Martin Bay Coombe Martin Bay, Devon. Rocky platform adjacent to muddy/sandy/shingly beach. Large man made pools at top of beach. |
In pools | Barbara Haddrill |
| P | 2004-06-18 | Croyde Beach Croyde Beach, west facing rocky platforms north of sandy bay. Midshore area, rock rocks with frequent pools, shallow and deep. Sunny & cloudy, strong breeze site 2 |
In rockpools 2% coverage (5m x 5m area) | David Butt (Brauton School) |
| P | 2004-06-18 | Croyde Beach Croyde Beach, North Devon. West facing rocky platform north of sandy bay. Low shore area, steep & rugged rock with deep pools & gullies. Site 3. |
In pools 5% coverage (5m x 5m area) | David Butt (Brauton School) |
| C | 2004-08-03 | Snapes Point Snapes Point - sheltered shore |
All too common | Nigel Mortimer |
| O | 2004-08-14 | Padstow Near Padstow - rocks at edge of sandy beach and mouth of River Camel. |
Occassional Filling some pools. Appeared to be in poor health in some pools. | Jack Sewell |
| O | 2004-08-19 | Batten Bay Batten Bay, near Mountbatten |
Occassional in rockpools | Seashore Safari |
| Abundant | 2001-08-22 | Church Reef Church Reef, Wembury, Devon |
Found in rock pools. | Will Rayment |
| A | 2005-03-12 | Firestone Bay Firestone Bay, Plymouth Sound |
Seen in rockpools | Seashore Safari |
| 100 | 2005-06-10 | East coast of Great Cumbrae Island. Between the 'Wishing Well' and Keppel pier |
Frequent (>100 ) specimens in lower littoral - on cobble/pebble substrate. | David Donnan |
| 55 | 2005-06-22 | Batten Bay Batten Bay, Plymouth Sound |
Abundant | Inigo Urrutia |
| C | 2005-06-27 | Saltdean, east of Brighton, East Sussex |
Common, starting to dominate in rockpools on chalk bedrock in middle/upper zone. | Kate Cole |
| A | 2005-06-14 | Birling Gap, near Eastbourne, East Sussex |
Abundant, completely dominating rock pool on chalk platform near the top of the shore. | Kate Cole |
| P | 2005-06-25 | Portwrinkle, Whitsand Bay |
Seen in rockpools | Judith Oakley |
| P | 2005-05-24 | Mothecombe Beach Mothecombe Beach near Erme Estuary, South Devon |
Seen by group 8, years 4-6, Fiona, Amy, Anna, Sophie and Georgina | Holbeton School |
| P | 2005-05-24 | Mothecombe Beach Mothecombe Beach near Erme Estuary, South Devon |
Seen by group 6, year 3,5&6, Jack, Isaac, Tom Rogers, Francis and Anthony | Holbeton School |
| A | 2005-07-05 | Goodrington sands, Torbay |
abundant in rockpools | Judith Oakley |
| Many | 2005-08-28 | Old Harry's Rock, Studland, Dorset |
Near Old Harrys rock in shallow water | Sam Parr |
| some | 2005-10-04 | Lynmouth shore west. |
under rocks | Deddington School |
| Few | 2005-12-07 | e.g. South coast of Lindisfarne, near the harbour. |
On its own | |
| Present | 2006-03-01 | Intertidal below Hen Cliff, Kimmeridge |
Steve Trewhella | |
| abundant | 2006-06-27 | Jennycliff Beach, Plymouth |
In rockpools | Yealmpton Primary School |
| abundant | 2006-06-27 | Jennycliff Beach, PLymouth |
In rockpools | Newton Ferrers Primary School |
| Lots | 2006-06-05 | Portscatho |
Choking mid shore pools and also some stands just offshore when snorkelling | |
| Large plant, 1m long floating on surface in midde of Loch | ||||
| 3 | 2006-04-25 | Chesil cove |
Si Parker | |
| 10 | 2006-04-29 | South coast of Lindisfarne near the harbour. |
Many with eggs | Cat Ridout |
| None | 2007-01-23 | Branscombe Bay, Devon |
Milly Hatton-Brown | |
| present | 2007-03-10 | brandy bay kimmeridge |
Steve Trewhella | |
| Common | 2007-05-15 | Blackstone Rocks Blackstone Rocks |
Cat Ridout | |
| Common | 2007-05-15 | Blackstone Rocks Blackstone Rocks |
Cat Ridout | |
| Common | 2007-05-15 | Blackstone Rocks Blackstone Rocks |
Cat Ridout | |
| common | ||||
| 5 | 2007-06-03 | Cellars Beach, Yealm estuary |
small plants in rockpools | Jon Parr |
| 2007-07-14 | Jennycliff |
Jayne Evans | ||
| Common in certain areas | 2007-07-20 | Branscombe beach |
None was found during the time search though on other areas of the shore it was common in the rockpools. | Milly Hatton-Brown |
| Frequent | 2007-07-31 | Blackstone Rocks Blackstone Rocks, Wembury. |
Cat Ridout | |
| Several plants | 2007-08-19 | Sandy bay inshore of Davaar Island, Campbeltown, Argyll |
Plants up to 2 metres long attached to cobbles on sand. Removed to Dunstaffnage Marine Lab for analysis | Robin Harvey |
| abundant | 2007-09-30 | Wembury Point, near Plymouth |
Large stands, covering seabed on North side of Mewstone. | Jack Sewell |
| rarer than normal | 2007-10-26 | Batten Bay Batten Bay |
Small individual stems (<30cm) in pools on lower shore. | Jack Sewell |
| present | 2008-01-12 | Mount Batten, Plymouth |
Seashore Safari | |
| Several plants >1m long | 2007-08-19 | Campbeltown Loch near Davaar Island, Argyll & Bute |
Attached to small cobbles on sand. As many as possible were removed for identification/destruction | Robin Harvey |
| Not Found | 2008-04-18 | Mount Batten N50:21:25 W4:07:40 |
Rockpools | Seashore Safari |
| abundant | 2008-05-21 | Polzeath Polzeath north |
in roughly third of lower shore rock pools | Paula Ferris |
| lots | 2008-06-22 | Yealm Estuary |
Large bank just off rocky beach in estuary. Exposed at low tide. | Jon Parr |
| Common | 2008-07-01 | Hannafore beach South West coast of England. south east cornwall, hannafore beach, Looe. |
Extremely common and in most rockpools. All fronds about 0.75-1m tall. Mid-lower shore. Exposed rocky shore. | Amelia Bridges |
| one attached plant | 2008-07-09 | Carradale, East Kintyre peninsula, Argyll & Bute |
approx 50 cm long | Robin Harvey |
| Two plants in different locations | 2008-07-09 | Rocks at Westport, Kintyre, Argyll & Bute |
One plant completely removed; the second was in deep water, c. 60 cm long and the top 25 cm were snapped off. Shore at Roneachan, a few miles north was checked but no Sargassum found there. | Robin Harvey |
| frequent | 2008-07-30 | Porth Hellick, St Mary's, Isles of Scilly |
Rock pool | Larissa Paver |
| abundant | 2008-07-30 | Porth Hellick rocky shore, St Mary's Isles of Scilly |
rock pools | Larissa Paver |
| 5 plants | 2008-08-23 | Skipness beach, Kintyre, Argyll |
One growing in a rockpool. Others in a sandy lagoon attached to pebbles. All removed to above the high water mark. | Robin Harvey |
| 2008-09-28 | Battery Rocks Battery Rocks, Below Jubalee pool, Penzance |
Frequent. Rock pools of mid to low shore | Larissa Paver | |
| occasional | 2008-12-27 | Penzance Battery rocks, sourth of Jubilee Pool, Penzance |
Larissa Paver | |
| Very abundant | 2008-08-29 | North side of Ynys Lochtyn Cardigan Bay |
In one large, deep rockpool, dying back at end of season | Ben Sampson |
| 3 | 2009-05-24 | Stackhouse Cove, Penzance In gulleys and under overhangs at Stackhouse Cove during a low of 0.9m |
In rockpool | Larissa Paver |
| Uncommon | 2009-06-20 | Hastings Rocky shore below East Hill with some sand patches, shingle, pebbles and boulders. There is also a rocky \"platform\" mid-low shore with many crevices and small rock pools. Other species certainly present including some hydroids, bryzoans, brown flatworms, probable Bullhead and other fish |
Patches in rock pools | Nigel Sawyer |
| Occasional | 2009-06-27 | Torquay Marina All species found on the pontoon floats of Torquay Marina |
Wireweed | Holly Latham |
| Common | 2009-07-04 | Brixham Marina All species found on the pontoon floats in Brixham Marina |
Occuring in fairly small patches | Holly Latham |
| Approx. 9 clumps closely bunched | 2009-07-12 | Bellochantuy Natural harbour among rocks South of Bellochantuy village |
Anchored to bottom. Also in clumps drifting off shore. These clumps seriously fouled my outboard engine. | Angus Mcallister |
| Uncommon | 2009-07-05 | Cow Gap, Eastbourne Boulder, rocks and stone leading down to sea, some sandy/gravel patches, with small rock pools and some finer sediment. Un identified Spirobius sp, Sandhoppers and worm (prob Hermanthoe impar - picture sent via post) as well as seaweeds |
Dominant seaweed in some rock pools | Nigel Sawyer |
| Common | 2009-07-18 | Eastbourne, below Pinnacle Mainly soft bedrock with pools and some pebble and sandy areas. Storms previous day and persistant strong wind. Some unidentified hydroids (?Obelia) also found 2 metre low tide so water level fairly high |
Some rock pools full of this alien species | Nigel Sawyer |
| >20 | 2009-07-26 | Kildonan, Arran Almost flat sandstone pavement with occasional higher dykes. boulders and sandy lagoons. |
In shallow sandy 'lagoons' at low water with Zostera marina. Large plants | Robin Harvey |
| Abundant | 2009-08-07 | isle of muck muck harbour |
Japweed all over muck shore | Laura Mandleberg |
| 1 string per 10m of strandline | 2009-07-01 | Cleveleys Cleveleys at vue to rossall school |
Still green | Kathryn Turner |
| Common | 2009-08-21 | Cow Gap near Eastbourne Beach consisting mainly of bolders, cobbles, pebbles with patchs of clay and sand. |
Many pieces washed up | Nigel Sawyer |
| Uncommon | 2009-08-31 | Herne Bay Kent Below \"soft cliffs\" mainly sandy with some pools and bedrock of sandy clay. Some boulders on the shore often seaweed covered |
Clumps were washed up along the shore | Nigel Sawyer |
| Occasional | 2009-09-07 | Mousehole, Cornwall Rock platform just east of village, below \\\'bathing\\\' pool set into the rocks. |
In rock pools on middle shore | Larissa Paver |
| Common | 2010-04-21 | Cow Gap, Beachy Head Sussex Rock pools and sandstone area. Area of sand and some mud/ sand patches amongst the boulders and other rocks. Jaera sp also seen. Pools near the cliff had the seaweed Dumontia incrassata and shells of Mactra stultorum were also found (neither listed in DB) |
Widespread in the more sheltered pools | Nigel Sawyer |
| 1 | 2010-04-25 | Hope Gap, Seaford, Sussex Low tide on chalk platform boulders, pebbles, with gulleys present lower on shore |
One frond seen | Nigel Sawyer |
| 05/02/2011 | Gyllyngvase Beach Rocky shore to the left and right hand sides of the beach. |
Kristie Wilkinson | ||
| 1 frond | 01/04/2008 | West Mersea beach, Blackwater estuary, Essex Beach |
on beach | Adrian Wood |
| 1 large frond | 24/06/2008 | Martello Tower, Clacton, Essex Beach |
on beach | Adrian Wood |
| Rare | 03/04/2011 | Bognor Regis Following tide out. Strandline to tide line. Shingle to sand but with little washed up on sand. Many worm casts/ holes. Orange sponges also washed up. A single Pollachius sp (full size) was on the beach but too badly damaged to id to Pollock or COley (Gull attacked!) |
One pieces seen washed up and two in pools under pier | Nigel Sawyer |
| 30 | 08/04/2011 | Mount Edgecumbe The rocky shore around the point of Mount Edgecumbe. |
Bex House | |
| Common | 16/04/2011 | Nothe Fort, Weymouth Rocky shore below Nothe Gardens towards the Stone Pier. Some shells look more like Venerupis rhomboides than sengalensis. Some unidentified small shrimps/ prawns seen in wide crevices |
Widespread in rock pools | Nigel Sawyer |
| 1 | 02/06/2011 | Batten Bay Rocky shore at Mount Batten |
Marlin Beach Rangers | |
| Uncommon | 26/06/2011 | Hope Gap, Sussex Chalk platform with seaweed covering |
At least 4 clumps of this algae seen. Certainly more common that last year but does not seem to be covering large areas at the moment | Nigel Sawyer |
| Uncommon | 10/07/2011 | Hope Gap, Susex Chalk platform with channels, flints and a seaweed covering (Pepper Dulse being dominant) |
More found washed up on strandline | Nigel Sawyer |
| Common | 17/06/2012 | Splash Point, Seaford Chalk platform and shingle beach |
Many washed up fronds | Nigel Sawyer |