| Number seen/Abundance | Date | Location | Comments | Recorded by |
|---|---|---|---|---|
| 10+ | 2003-03-31 | Selsey Sandstone/clay wall that runs along on the West side just beyond Selsey Lifeboat Station. |
Usually seen beneath the Lifeboat station. | Paul Parsons |
| 2 | 2002-07-21 | Manobier Manobier, Pembrokeshire |
First in perfect condition. Second attacked. Both sighted during incoming tide, on rocky shore. | Jennet Dora Norman |
| Abundant | 2003-05-17 | Firestone Bay, Plymouth |
Seen under rocks and hiding in crevices. Variety of sizes seen. | Seashore Safari |
| 1 | 2003-07-16 | Polzeath, north Cornwall. Rocky shore |
Hiding under rock in pool. Carapace 4-5cm. | Liz Barton |
| 1 | 2003-07-11 | Constantine Bay - rocky shore with sandy inlets & gullies |
In a rockpool. | |
| 20 | 2003-08-10 | Rocky reef just outside and to the west of Rock harbour mouth. Depth of aprox 19m |
Many in pairs - looked like they were mating (one on top of another). | Chris Bunney |
| 3 | 2003-08-12 | Wembury, voluntary marine conservation area (VMCA), devon. |
1 carapace about 5cm across, other carpace 10-11cm across. Found under overhangs of bedrock. | Caroline Farrell |
| 4 | 2003-08-09 | Ravens Point Anglesey |
In crevices in rocks at depths around 6 metres. | Ken Byrne |
| 1 | 2003-08-23 | 500 m S of Peveril Point, in Durlston Bay near Swanage, Dorset |
Under a rock in 5 m of water. | Guy Baker |
| 20 | 2003-09-20 | Menai straits under Menai Bridge |
At various locations, often in mating pairs and often under rock overhangs | Ken Byrne |
| 4 | 2003-07-17 | Landing craft of White Nothe, Dorset and surrounding seabed |
Charles Whitworth | |
| 6 | 2003-07-31 | Lulworth banks |
In ledges. | Charles Whitworth |
| P | 2003-08-03 | Worbarrowbay reef near wreck of the Black Hawk, off Portland Bill. |
Charles Whitworth | |
| 6 | 2003-08-07 | Ariels on the west side of Portland Bill |
On extensive mussel beds from 30 m and shallower. | Charles Whitworth |
| 1 | 2004-02-20 | Batten Bay, Mountbatten, near Plymouth |
Angie Squires | |
| 6 | 2004-02-20 | Batten Bay, Plymouth |
Under rock in rockpool | Robert Taylor |
| 4 | 2004-02-20 | Batten Bay,Plymouth, rocky shore with boulders |
Under rocks, by pools | Shereon Knowles |
| 20 | 2004-03-28 | Sandstone wall and ridges.West side of Selsey Lifeboat Station, West Sussex. |
Scattered around the rubble beneath the lifeboat station. | Paul Parsons |
| low (aprox | 2002-10-10 | Wreck, Ardmucknisk Bay |
larger than I am used to seeing off the South coast of England | Chris Ingham |
| 20 | 2001-10-28 | Swanage Pier |
Resting in rock clusters | Kevin Regan |
| Abundant | 2000-10-14 | Portrush, N. Ireland "Blue Pool", rocky shoreline. |
Very common all along North Antrim and Donegal coasts. | Deirdre Walsh |
| P | 2002-03-28 | Batten Bay, nr Plymouth |
Amongst rocks and weed | Caroline Farrell |
| 14 | 2002-09-09 | Rocky shore (intertidal), Nrth side of Whitley bay, Northumberland |
Found amongst kelp and stones normally covered by tide. Many individuals of all ages and sizes. | Fiona Greenwold |
| 2 | 2000-09-09 | Weasal Diving Hole, Eyemouth, Scotland. |
No information entered | Terry Middleton |
| 1 | 2002-08-04 | South west of Trevelgue head, Newquay Bay |
Seen in rock pool | Mrs T Whittaker |
| 1 | 2002-10-05 | Rocks at North end of Polzeath beach. |
No further information | Guy Baker |
| 25 | 2001-09-16 | Shankill Beach between Bray and Killiney, County Dublin Ireland. |
8 male (1 soft), 4 female (2 soft), 13 unsexed. | Tim Clabon |
| 1 | ||||
| 5 | 2002-07-07 | Pen-y-holt bay, Pembrokeshire |
Low tide -active species | Zoe Abbott |
| 1 | found sheltering under rock in mid littoral zone. | |||
| Numerous | 2002-06-19 | Jennycliff Bay, nr Plymouth |
Found under boulders on the shore | Ali Hood |
| 1 | 2002-06-28 | Rocky shore, Cardigan Bay, west Wales. |
The crab was sighted at the edge of the pool, it was feeding and moved abrutly when I disturbed the water. | Mrs L.M. Hicks |
| A | 2000-07-08 | Hole in the wall, Falmouth, Cornwall. |
Abundant various sizes seen, carapace from 5-10cm wide. | Terry Middleton |
| P | ||||
| C | 2004-04-06 | Batten Bay, Mountbatten, near Plymouth |
Common , found under rocks on lower shore. Many very large individuals. | Seashore Safari |
| O | 2004-04-07 | Helford passage + Bar beach, Helford River, Cornwall. |
mid to low shore | Ruth Williams |
| C | 2004-05-06 | Batten Bay, Mountbatten nr Plymouth |
Common under rocks on lower shore. Many very large individuals. | West Park Primary |
| abundant | 2004-05-08 | Jennycliff Bay, near Plymouth. Rocky shore, alongside sandy/gravelly beach. |
under rocks all over the shore | Seashore Safari |
| P | 2004-04-06 | Wembury VMCA |
Cat Ridout | |
| O | 2004-04-18 | Lampay Island reef, Isle of Skye |
Occassional amongst rocks and boulders | Alison Fish |
| C | 2004-06-05 | Wembury Beach, South Hams, Devon. Rocky shore with some sandy patches |
Common under rocks mid - low shore | Seashore Safari |
| 1 | 2004-07-05 | Batten Bay Batten Bay, Nr Plymouth. |
rockpool | Seashore Safari |
| 2 | 2004-06-07 | Tunnels beach Tunnels beach, Ilfracombe, North Devon. Low shore between pools |
Under a stone in high shore pool | Kim-Marie Clothier |
| 1 | 2004-06-01 | Widmouth Head Near Widmouth Head, Devon. Small rock beach adjacent to sandy/muddy harbour/rhia |
Under rock | Barbara Haddrill |
| P | 2004-08-19 | Batten Bay Batten Bay, near Mountbatten |
Found on lower shore | Seashore Safari |
| 20 | 2001-10-28 | Swanage Pier |
Saw 1 feeding. | Kevin Cunningham |
| P | 2001-10-28 | Swanage Pier Swanage Pier |
Crabs were generally under rocks and in crevices. There were 2 pairs where 1 was on top of the other. | Roger Onions |
| 2 | 2001-06-22 | Abercastle Bay Abercastle Bay, Pembrokeshire |
Sheltering in cliff crevice approximately 4.5 inches across carapace | Ali Champion |
| 1 | 2002-07-13 | Coves Haven Coves Haven, Lindisfarne |
In rock pool | Jenny Prince |
| 1 | 2002-09-28 | British Inventor British Inventor wreck on Adamant Shoal, Dorset |
Charles Whitworth | |
| C | 2001-09 | Blue Pool, Porthrush, east of Ramore Head |
Common | Deirdre Walsh |
| 12 | 2001-09-30 | Swanage Pier Swanage Pier |
Prolific species here but aggressive to divers. | Richard Beech |
| 2 | 2001-09-30 | Swanage Pier |
alongside edible crab also reported | Ray Carlton |
| Numerous | 2002-06-19 | Jennycliff Bay, nr Plymouth |
Found under boulders on the shore | Ali Hood |
| 1 | 2001-05-20 | Wembury beach Wembury Beach, Devon |
Crab was hiding under a large rock at the seaward end of large pool open to the sea. | Samuel Parr |
| 1 | 2000-09-09 | St Abbs Big Green Carr/Amphitheatre St Abbs, Scotland. |
No information entered | Terry Middleton |
| 1 | 2004-09-18 | Batten Bay Batten bay, Plymouth |
Marina Marltby | |
| 3 | 2004-10-26 | Wembury beach Wembury beach |
Rock pool | Simon Roper |
| 1 | 2004-12-27 | long sandy beach with rocks on either side |
I saw the bright red eyes under the rock, didn't really want to bother it. | Charlie Smith |
| 1 | 2004-01-31 | Wembury beach Wembury beach, rocks |
Under rocks in a midwater rockpool. | Jack Sewell |
| P | 2005-02-01 | Southampton water |
Abi Birkett | |
| P | 2005-03-02 | Lynmouth foreshore Lynmouth foreshore west |
Some seen in a rock pool | Harwell School |
| 6 | 2005-04-09 | Langerstone Point |
Under weed covered rocks, carapaces 4 to 10cm | Katherine Hill |
| P | 2005-04-09 | Snapes Point - sheltered shore |
Very common | Nigel Mortimer |
| A | 2005-03-12 | Firestone Bay Firestone Bay, Plymouth Sound |
Seen in crevices, rockpools and under rocks | Seashore Safari |
| A | 2005-04-09 | Batten Bay Batten Bay, Plymouth Sound |
Seen under rocks | Seashore Safari |
| P | 2005-04-20 | Lynmouth Beach Lynmouth Beach |
Lots found in rock pool on lower shore | Mary Killick |
| 20 | 2005-05-27 | Batten Bay Batten Bay, Plymouth Sound |
Carapace up to 6 cm diameter. Mid-lower shore, under stones and in rock pools. | Sonia Rowley |
| 5 | 2005-06-22 | Batten Bay Batten Bay, Plyjmouth Sound |
Beneath rocks in rock pools | Tim Argyle |
| 6 | 2005-06-22 | Batten Bay Batten Bay, Plymouth Sound |
under a rock in a pool on middle shore | Tim Moore |
| 3 | 2005-06-22 | Batten Bay Batten Bay, Plymouth Sound |
Under rocks | Inigo Urrutia |
| 3 | 2005-07-08 | Blackstone Rocks on Blackstone Rocks at Wembury Beach |
2 x carapace length approx 100mm, 1xcarapace approx 70mm in mid shore rockpools | Cat Ridout |
| 2 | 2005-07-12 | Blackstone Rocks Blackstone Rocks Wembury Beach |
1 low shore rockpool approx30-35mm carapace, 1 approx100mm carapace lenght in other low shore rockpool | Cat Ridout |
| 1 | 2005-07-19 | Blackstone Rocks Blackstone Rocks Wembury Beach |
carapace length approx 80mm, low shore | Cat Ridout |
| 6 | 2005-07-25 | Blackstone Rocks Blackstone Rocks Wembury Beach |
all lows hore pools under rocks or in crevices, one whopper!! approx carapace 120mm across! | Cat Ridout |
| 8 | 2005-08-20 | Blackstone Rocks Blackstone Rocks, Wembury Beach, Plymouth |
Low tide rockpools. Sizes ranged = 2cm, 3cm, 4cm, 7cm, 10cm carapace width | Cat Ridout |
| one | 2006-01-28 | ex HMS Scylla |
In one of the pyrotechnic tubes on the foredeck near the bows | Peter Messenger |
| 1 | 2003-06-18 | Wembury Rocky shore, Wembury Beach, South Devon. |
Seen under a rock. | Cat Ridout |
| 2 | 2003-06-25 | Wembury Wembury Beach, South Devon |
Cat Ridout | |
| 2 | 2003-07-14 | Wembury Rocky shore, Wembury Beach, South Devon. |
Cat Ridout | |
| 1 | 2003-07-17 | Wembury Wembury Beach, south Devon. |
Cat Ridout | |
| 2 | 2006-02-12 | Wreck of the HMS Scylla, Whitsand Bay, Cornwall |
One on top deck and one on deck two. | Becky Seeley |
| Common | 2006-02-11 | Babbacombe bay - few metres off shore |
Very large! All in crevices in reef | Faye Wood |
| Common | 2006-03-01 | Intertidal below Hen Cliff, Kimmeridge |
Steve Trewhella | |
| 1 | Under rock in rockpool | |||
| 1 | 2006-07-19 | Blackstone Rocks Blackstone Rocks, Wembury Beach |
Lower shore, 14cm carapace | Cat Ridout |
| 1 | 2006-07-21 | Blackstone Rocks Blackstone Rocks |
12cm carapace | Cat Ridout |
| 1 | 2006-05-13 | Lynmouth bay, old victorian swimming pool |
Jonathon Holroyd | |
| 18 | 2006-05-27 | Blackstone Reef Blackstone reef |
4cm - 10cm carapace length | Cat Ridout |
| 15 | 2006-05-31 | Blackstone Rocks Blackstone Rocks, Wembury Beach |
2.5 - 9cm | Cat Ridout |
| 3 | 2006-06-08 | Blackstone Rocks Blakstone Rocks, Wembury Beach |
Middle shore, 3cm, 9cm, 5cm carapace | Cat Ridout |
| 2 | 4cm and 9cm carapace | |||
| 2 | Low shore pools, one carapace approx 60mm width one approx 40mm width | |||
| 7 | Under rocks in low tide rockpools or in crevices, 2 premate pairs | |||
| 15 | Under rocks and in crevices at low shore | |||
| 3 | 2006-04-25 | Chesil cove |
Si Parker | |
| 6 | 2006-04-29 | South coast of Lindisfarne near the harbour. |
Cat Ridout | |
| 2 | 2007-03-16 | Lee Bay Lee Bay, near Ilfracombe, North devon |
Rockpool, approx 7cm | Caroline Roberts |
| 2003-04-15 | Exuvia on strndline | Kathryn Turner | ||
| 2003-03-23 | Fleetwood north Fleetwood north, Flyde coast |
Dead and exuvia | Kathryn Turner | |
| Common | 2007-04-03 | Mount Batten Beach |
Found under rocks in rockpools | Milly Hatton-Brown |
| numerous | Under rocks wet or dry at low tide | |||
| Occasional | 2007-05-01 | Blackstone Rocks Blackstone Rocks |
Cat Ridout | |
| Common | 2007-05-03 | Blackstone Rocks Blackstone Rocks |
We saw some moulted shells too | Cat Ridout |
| Common | 2007-05-15 | Blackstone Rocks Blackstone Rocks |
Cat Ridout | |
| 5 | 2007-05-16 | Blackstone Rocks Blackstone Rocks |
Cat Ridout | |
| Common | 2007-05-17 | Blackstone Rocks Blackstone Rocks |
Including many small juveniles. | Cat Ridout |
| 3 | 2007-06-17 | Chesil Cove Chesil Cove, Dorset |
Polly Whyte | |
| Common | 2007-07-19 | Branscombe beach |
2 found under rocks in rockpools | Milly Hatton-Brown |
| 2 | 2007-07-31 | Blackstone Rocks Blackstone Rocks, Wembury. |
Cat Ridout | |
| Common | ||||
| Common | 2007-08-02 | Blackstone Rocks Blackstone Rocks |
Cat Ridout | |
| Abundant | 2007-08-03 | Blackstone Rocks Blackstone Rocks (very low tide, went further down lower shore) |
Cat Ridout | |
| p | 2007-08-10 | Kimmeridge bay dorset |
Steve Trewhella | |
| 3 | 2007-09-26 | Lynmouth Lynmouth |
Low on beach foreshore | tony jones |
| common | 2007-09-28 | Oxwich Bay, right hand side on and around rocks leading to Oxwich point, Gower |
many mating pairs under rocks | Judith Oakley |
| 12 | 2007-10-10 | Barricane and Coombesgate Barricane and Coombesgate, Woolacombe |
low tide Coombesgate - all sizes | Paula Ferris |
| 3 | 2007-10-11 | Barricane Beach towards Grunta, woolacombe |
Low shore, base of rocks under weed, 12cm | Paula Ferris |
| 1 | 2007-10-26 | Oxwich Point Oxwich Point, Swansea, Wales |
Lower shore | Shore Thing |
| 1 | 2008-05-05 | Clacton on Sea beach near Martello tower (old butlins iste) near the large breakwaters |
Caught on a crabber line, unconfirmed and no photo, I didnt personally see it but son is addament ! | Peter Webster |
| Present | 2008-06-06 | Batten Bay, Mount Batten, Plymouth |
Seashore Safari | |
| 2 | 2008-07-01 | Blackstone Rocks Blackstone rocks |
seen in rockpool hiding in seaweed | Cat Ridout |
| abundent | 2008-07-01 | Blackstone Rocks Blackstone rocks |
in rockpools | Cat Ridout |
| 1 | 2008-07-01 | Hannafore beach South West coast of England. south east cornwall, hannafore beach, Looe. |
Found under large rock in a rockpool.The main body was about 9cm across. Mid-shore. Exposed rocky shore. | Amelia Bridges |
| 1 | 2008-07-16 | Portnaddler beach South East Cornwall, Looe, Portnaddler Beach. |
About 15cm across. Very vicious. Bright red eyes. Under the seaweed at very low tide on the lower shore. | Amelia Bridges |
| abundant | 2008-08-01 | Blackstone Rocks Blackstone rocks. |
Cat Ridout | |
| abundant | 2008-08-02 | Blackstone Rocks Blackstone rocks |
Cat Ridout | |
| 2008-09-28 | Chesil Cove Chesil Cove, Portland, Dorset |
Trish Carter | ||
| Abundant | 2009-04-07 | Blackstone Rocks Rockpools |
Various sizes | Cat Ridout |
| Common | 2009-04-09 | Blackstone Rocks, Wembury Rockpools |
Cat Ridout | |
| Common | 2009-04-10 | Blackstone Rocks, Wembury Rockpools |
Cat Ridout | |
| 5 | 2009-04-11 | Blackstone Rocks, Wembury Rockpools |
Cat Ridout | |
| abundant | 2009-05-24 | Blackstone Rocks, Wembury Rockpools |
Cat Ridout | |
| 1 | 2009-06-09 | Coombesgate, Woolacombe 2 sandy bays divided by small rocky headlands with extensive rocks at low tide. |
Got my finger, middle sized, amongst weed, low shore rocks | Paula Ferris |
| 1 | 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 |
Single large individual - dead | Nigel Sawyer |
| 10 | 2009-07-06 | Mount Batten Rocky beach situated just out of Plymouth Sound. Exposed to harsh weather conditions and strong currents. |
Under rock | Liz Bone |
| 15 | 2009-09-09 | Scarborough Holbeck Location was at low tide, around 1.10 mark |
Found all over the mid/low rocky shore in great varition in size | richard white |
| 1 | 2009-09-21 | Eastbourne Pier The pier at Eastbourne. Sandy beach below shingle with some soft bedrock with pools. In addition to the list Mactra stultrom common, as were hydroids (unidentified on the pier structure) |
Single adult seen attacking hydroids on pier | Nigel Sawyer |
| 1 | 2009-11-01 | Fleetwood North Sunken car park in Fleetwood, Lancashire. |
North West Wildlife Trusts Irish sea | |
| 2 | 2009-12-06 | Northern Ireland, Belfast Lough Belfast Lough |
Rockpool, 65mm | Jamie Crozier |
| 2 | 2009-12-12 | Farne Islands Rocky islands 20 minutes by boat from Seahouses, Northumberland. Small islands 5 minutes north west of the largest Island |
Scavenging on rocks | Lauren Burghes |
| n/a | 2010-01-22 | Morecambe Morecambe, Polo Tower, Lancashire |
Live specimens | North West Wildlife Trusts Irish sea |
| 3 | 2010-03-02 | Greencliff, near Westward Ho Semi exposed rocky shore, facing north west, wave cut platform with gullies, some sand at low water |
under rocks low shore | Paula Ferris |
| 1 | 2010-04-25 | Hope Gap, Seaford, Sussex Low tide on chalk platform boulders, pebbles, with gulleys present lower on shore |
Found under stone. Scuttled off with its obvious red eyes! | Nigel Sawyer |
| Rare | 2010-05-15 | Holbeck, Scarborough Rocky shore with large tidal pools, kelp forest and bare sediment |
Anthony Hurd | |
| 3 | 2010-08-15 | Church Bay Out at sea. Approximately 20-25m deep. |
Thomas Busbridge | |
| 9 | 2010-09-09 | Westward Ho! Semi-exposed shore, rocky shore at end sandy beach, rock platform cut by gullies and pools, sand at low tide |
Not many, smallish, low shore | Paula Ferris |
| 3 | 2010-10-06 | Plimont, Guernsey Semi enclosed bay, sand with outcrops of rock perpemdicular to low water mark. Associated with the outcrops are motile stones and pools. (many alga species in rock pools dieing back) |
Under rocks. | Tabitha Pearman |
| common | 2011-01-20 | Portreath harbour entrance A narrow North Cornwall coast harbour. Very exposed. Some sand/mud, some loose rocks.Mostly hard rock. |
to 80mm under some rocks | Treve Opie |
| 1 | 05/02/2011 | Gyllyngvase Beach Rocky shore to the left and right hand sides of the beach. |
Under large rock in rock pool | Kristie Wilkinson |
| 3 | 05/03/2011 | Gyllyngvase Beach, Falmouth Rocky shore |
Kristie Wilkinson | |
| 10 | 02/06/2011 | Batten Bay Rocky shore at Mount Batten |
Marlin Beach Rangers | |
| 10 | 01/06/2011 | Devil's Point Rocky shore at Devil's Point |
Marlin Beach Rangers | |
| 5 | 02/08/2011 | Devil's Point Rocky shore |
Marlin Beach Rangers | |
| 30 plus | 27/08/2011 | Hallsands, South Devon Shallow dive 4-5m just off South Hallsands |
Various sizes, mainly in the rock crevices | Jackie Vale |
| 2 | 28/09/2011 | Eastbourne Chalk platform in the east and sandy areas at low tide with soft rock and rock pools. |
Dead specimens found | Nigel Sawyer |
| 50 | 24/09/2011 | Swanage Water depths of 2m to 30m with water temperature of 18 degrees C. |
Numerous sightings between 3m and 30m deep. | Julian Madle |
| 10 | 04/09/2011 | St Abbs Coastal rocky areas, north of Berwick up on Tweed, near Eyemouth in Scotland. |
Frequent sighting of adults at a depth of 15 to 20m | Julian Madle |
| 30 | 20/01/2012 | Gortein point East side of Loch Fyne, Scotland |
some berried | Peter Bardsley |
| frequent | 10/03/2012 | Greencliff Moderately exposed rocky shore. Wave-cut platform with infrequent sandy gullies. Frequent small pools. Entire upper shore comprising very dynamic large pebble ridge. |
Commonly found under stones, often with C. pagarus. Sizes from 2cm to 7cm across. Mainly lower shore. | Robert Durrant |
| 1 | 12/05/2012 | Fort Bovisan, Plymouth sheltered harbour |
observed in crevis in rock | keithrd krd |
| Common | 04/06/2012 | Greencliff Area of overhanging rock strata running at right-angles to the sea, with gullies open to NW, often sandy-bottomed. Lower part of wave-cut platform, with upper beach comprising large and very dynamic pebble ridge backed by high cliffs. Erosion of softer rock has created many shady crevices. |
Commonly found mid-shore, and more abundant on lower shore, often full-grown. | Robert Durrant |