Crabs of the British Isles

Around 65 species of crab occur in the waters of the British Isles.[1][Note 1] All are marine, with the exception of the introduced Chinese mitten crab, Eriocheir sinensis, which occurs in fresh and brackish water. They range in size from the deep-water species Paromola cuvieri,[3] which can reach a claw span of 1.2 metres (3 ft 11 in),[4] to the pea crab, which is only 4 mm (0.16 in) wide and lives inside mussel shells.

Largest and smallest crabs of the British Isles

Paromola cuvieri (up to 120 cm claw span)

Pinnotheres pisum (up to 4 mm across the carapace)

Fisheries

Commercial crabs in the British Isles

Nearly 30,000 t of the edible crab Cancer pagurus is landed in the British Isles every year.

1,500 t of the spider crab Maja squinado is landed in the British Isles every year.

More than 500 t of the shore crab, Carcinus maenas, is landed in the British Isles every year.

Up to 200 t of the velvet crab, Necora puber, is landed in the British Isles every year.

Several species of wild crab are the subject of crab fisheries around the coasts of the British Isles. The most important are the brown crab or edible crab, Cancer pagurus (29,193 t), various swimming crabs (3,180 t), the spider crab Maja squinado (1,565 t), the shore crab or green crab Carcinus maenas (553 t) and the velvet crab Necora puber (193 t). Around 77% of the catch is landed in the United Kingdom, 19% in Ireland, 4% in the Channel Islands, and 1% in the Isle of Man.[Note 2]

Species

62 species have been directly observed in the waters of the British Isles:[1][Note 3]

Dromiidae

Dromia personata (Linnaeus, 1758)

Homolidae

Paromola cuvieri (Risso, 1816)

Leucosiidae

Ebalia cranchii Leach, 1817
Ebalia granulosa H. Milne-Edwards, 1837
Ebalia nux A. Milne-Edwards, 1883
Ebalia tuberosa (Pennant, 1777)
Ebalia tumefacta (Montagu, 1808)

Majidae

Maja squinado (Herbst, 1788)
Eurynome aspera (Pennant, 1777)
Eurynome spinosa Hailstone, 1835

Oregoniidae

Hyas araneus (Linnaeus, 1758)
Hyas coarctatus Leach, 1815

Inachidae

Achaeus cranchii Leach, 1817
Inachus dorsettensis (Pennant, 1777)
Inachus leptochirus Leach, 1817
Inachus phalangium (Fabricius, 1775)
Macropodia deflexa Forest, 1978
Macropodia linaresi Forest & Zariquiey Alvarez, 1964
Macropodia rostrata (Linnaeus, 1761)
Macropoda tenuirostris (Leach, 1814)

Epialtidae

Pisa armata (Latreille, 1803)
Pisa tetraodon (Pennant, 1777)

Parthenopidae

Parthenopides massena (Roux, 1830)

Corystidae

Corystes cassivelaunus (Pennant, 1777)

Atelecyclidae

Atelecyclus rotundatus (Olivi, 1792)
Atelecyclus undecimdentatus (Herbst, 1783)

Thiidae

Thia scutellata (Fabricius, 1793)

Pirimelidae

Pirimela denticulata (Montagu, 1808)

Cancridae

Cancer bellianus Johnson, 1861
Cancer pagurus Linnaeus, 1758

Portunidae

Callinectes sapidus Rathbun, 1896
Carcinus maenas (Linnaeus, 1758)
Bathynectes longipes (Risso, 1816)
Bathynectes maravigna (Prestandrea, 1839)
Liocarcinus corrugatus (Pennant, 1777)
Liocarcinus depurator (Linnaeus, 1758)
Liocarcinus holsatus (Fabricius, 1798)
Liocarcinus marmoreus (Leach, 1814)
Liocarcinus navigator (Herbst, 1794)
Liocarcinus pusillus (Leach, 1815)
Liocarcinus zariquieyi Gordon, 1968
Macropipus tuberculatus (Roux, 1830)
Necora puber (Linnaeus, 1767)
Polybius henslowii Leach, 1820
Portumnus latipes (Pennant, 1777)
Xaiva biguttata (Risso, 1816)

Geryonidae

Geryon trispinosus (Herbst, 1803)

Goneplacidae

Goneplax rhomboides (Linnaeus, 1758)

Xanthidae

Monodaeus couchi (Couch, 1851)
Xantho hydrophilus (Herbst, 1790)
Xantho pilipes A. Milne-Edwards, 1867

Panopeidae

Dyspanopeus sayi (S. I. Smith, 1869)
Rhithropanopeus harrisii (Gould, 1841)

Pilumnoididae

Pilumnoides inglei Guinot & Macpherson, 1987

Pilumnidae

Pilumnus hirtellus (Linnaeus, 1761)

Grapsidae

Pachygrapsus marmoratus (Fabricius, 1787)
Planes minutus (Linnaeus, 1758)

Varunidae

Brachynotus sexdentatus (Risso, 1827)
Eriocheir sinensis H. Milne-Edwards, 1853
Asthenognathus atlanticus Monod, 1933

Pinnotheridae

Nepinnotheres pinnotheres (Linnaeus, 1758)
Pinnotheres pisum (Linnaeus, 1767)

Three deep-water species have also been recorded near the British Isles, and are likely to occur in the area. These are:[1]

Cymonomus granulatus (Norman in Wyville Thomson, 1873) (Cymonomidae)
Dorhynchus thomsoni Wyville Thomson, 1873 (Inachidae)
Rochinia carpenteri (Wyville Thomson, 1873) (Epialtidae)

Notes

Howson & Picton define the waters of the British Isles to be the area within the 200 metres (660 ft) isobath surrounding the British Isles, between 48 °N and 62.5 °N, and between 13 °W and 6 °E; this includes the English Channel and parts of the North Sea coasts of Belgium and the Netherlands, but excludes the Faroe Islands.[2]
Fishery data is for the year 2009, and is taken from the FAO's online database, summing the captures for the Channel Islands, Isle of Man, Ireland and the United Kingdom.[5]
Nomenclature follows Ng et al. (2009).[6]

References

J. M. C. Holmes; M. J. Costello & D. W. Connor (1997). "Crustacea". In Christine M. Howson & Bernard E. Picton (eds.). The Species Directory of the Marine Fauna and Flora of the British Isles and Surrounding Seas (PDF). Ulster Museum and the Marine Conservation Society. pp. 142–209. ISBN 978-0-948150-06-7.
Christine M. Howson & Bernard E. Picton, eds. (1997). "Introduction". The Species Directory of the Marine Fauna and Flora of the British Isles and Surrounding Seas (PDF). Ulster Museum and the Marine Conservation Society. pp. 5–8. ISBN 978-0-948150-06-7.
Michael McCarthy (April 22, 2010). "Britain's biggest crab emerges from the deep". The Independent. Retrieved February 12, 2012.
Mike Thurston (1987). "Record breaking crab is not such a strange catch". New Scientist. 114 (1554): 24.
"Global Capture Production 1950–2009". Food and Agriculture Organization. Retrieved February 12, 2012.
Peter K. L. Ng; Danièle Guinot & Peter J. F. Davie (2008). "Systema Brachyurorum: Part I. An annotated checklist of extant Brachyuran crabs of the world" (PDF). Raffles Bulletin of Zoology. 17: 1–286. Archived from the original (PDF) on 2011-06-06.

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[3] Howson & Picton define the waters of the British Isles to be the area within the 200 metres (660 ft) isobath surrounding the British Isles, between 48 °N and 62.5 °N, and between 13 °W and 6 °E; this includes the English Channel and parts of the North Sea coasts of Belgium and the Netherlands, but excludes the Faroe Islands.[2]

[FAO-7] Fishery data is for the year 2009, and is taken from the FAO's online database, summing the captures for the Channel Islands, Isle of Man, Ireland and the United Kingdom.[5]

[9] Nomenclature follows Ng et al. (2009).[6]

[Holmes-1] J. M. C. Holmes; M. J. Costello & D. W. Connor (1997). "Crustacea". In Christine M. Howson & Bernard E. Picton (eds.). The Species Directory of the Marine Fauna and Flora of the British Isles and Surrounding Seas (PDF). Ulster Museum and the Marine Conservation Society. pp. 142–209. ISBN 978-0-948150-06-7.

[2] Christine M. Howson & Bernard E. Picton, eds. (1997). "Introduction". The Species Directory of the Marine Fauna and Flora of the British Isles and Surrounding Seas (PDF). Ulster Museum and the Marine Conservation Society. pp. 5–8. ISBN 978-0-948150-06-7.

[4] Michael McCarthy (April 22, 2010). "Britain's biggest crab emerges from the deep". The Independent. Retrieved February 12, 2012.

[5] Mike Thurston (1987). "Record breaking crab is not such a strange catch". New Scientist. 114 (1554): 24.

[6] "Global Capture Production 1950–2009". Food and Agriculture Organization. Retrieved February 12, 2012.

[Ng-8] Peter K. L. Ng; Danièle Guinot & Peter J. F. Davie (2008). "Systema Brachyurorum: Part I. An annotated checklist of extant Brachyuran crabs of the world" (PDF). Raffles Bulletin of Zoology. 17: 1–286. Archived from the original (PDF) on 2011-06-06.