Ebalia tumefacta

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Ebalia tumefacta
Ebalia tumefacta.jpg
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Order: Decapoda
Infraorder: Brachyura
Family: Leucosiidae
Genus: Ebalia
Species: E. tumefacta
Binomial name
Ebalia tumefacta
(Montagu, 1808)
Synonyms [1]
  • Cancer tumefacta Montagu, 1808
  • Ebalia aspera Costa, 1853

Ebalia tumefacta, sometimes called Bryer's nut crab,[2] is a species of crab in the family Leucosiidae.[1]


Ebalia tumefacta is a small, roughly diamond-shaped crab, with noticeably bulbous branchial regions. The carapace is wider than it is long, and has minute bumps, giving it a somewhat rough texture. It grows to about 12 millimetres (0.47 in) long and 13 mm (0.51 in) wide. The colouration varies greatly. Although some may have a variegated brown and black carapace, it usually ranges from reddish to greyish-white or yellowish-grey. Sometimes it may have red spots, and occasionally may contain an orange margin and a pale pink median band.[3] The shell has a fine, granular texture. The arms are equal in length and the claws are roughly equal in size.[2]


This species is found from West Africa to Norway, and is especially common around the British Isles;[4] it does not occur in the Mediterranean Sea.[2]


Ebalia tumefacta lives in muddy sand and gravel at depths of 2–15 metres (6 ft 7 in–49 ft 3 in).[2]


  1. ^ a b Charles Fransen & Michael Türkay (2012). "Ebalia tumefacta (Montagu, 1808)". World Register of Marine Species. Retrieved December 9, 2012. 
  2. ^ a b c d P. J. Hayward; M. J. Isaac; P. Makings; J. Moyse; E. Naylor; G. Smaldon (1995). "Crustaceans". In P. J. Hayward; John Stanley Ryland. Handbook of the Marine Fauna of North-west Europe. Oxford University Press. pp. 289–461. ISBN 978-0-19-854055-7. 
  3. ^ Mario de Kluijver; Sarita Ingalsuo. "Ebalia tumefacta". Macrobenthos of the North Sea – Crustacea. Marine Species Identification Portal. Retrieved December 9, 2012. 
  4. ^ Frank Emil Moen; Erling Svensen (2004). Marine Fish & Invertebrates of Northern Europe. AquaPress. ISBN 9780954406028.