A gammarid shrimp (Gammarus chevreuxi)

Distribution data supplied by the Ocean Biodiversity Information System (OBIS). To interrogate UK data visit the NBN Atlas.Map Help



A small shrimp-like species that grows up to about 13 mm in length. The head has lateral lobes that which are broadly truncated and the eyes are moderately large and kidney shaped. Antenna 1 has few hairs but antenna 2 in the male has many hairs, some long and curled. Male sub-claws (1st and 2nd appendages) and tail appendages also bear long curled hairs.

Recorded distribution in Britain and Ireland

Gammarus chevreuxi is may be locally abundant and has been recorded off Anglesey, North Wales, the River Taw estuary in north Devon, the estuaries of Falmouth, Fowey, and Plymouth, and at Teignmouth on the south coast.

Global distribution

Atlantic coast of Europe and north Africa


Gammarus chevreuxi can be found in brackish waters, especially coastal marshes, saline lagoons and drainage ditches. It is often found on mud, sand and stones within estuaries.

Depth range


Identifying features

  • Laterally compressed smooth body up to about 13 mm long.
  • Head with lateral lobes broadly truncated.
  • Moderately large and kidney shaped eyes.
  • In the male, antenna 2 has many setae some long and curled.
  • Male sub claws (gnathopods 1 and 2), pereopod 3 and uropod 3 also have long fine curled setae.
  • Curled setae absent in females.

Additional information

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Listed by

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  1. Dorey, A.E., Little, C. & Barnes, R.S.K., 1973. An ecological study of the Swanpool, Falmouth. II. Hydrography and its relation to animal distributions. Estuarine, Coastal and Shelf Science, 1, 153-176.

  2. Hayward, P., Nelson-Smith, T. & Shields, C. 1996. Collins pocket guide. Sea shore of Britain and northern Europe. London: HarperCollins.

  3. Hayward, P.J. & Ryland, J.S. 1994. The marine fauna of the British Isles and north-west Europe. Volume 1. Introduction and Protozoans to Arthropods. Oxford: Clarendon Press.

  4. Howson, C.M. & Picton, B.E., 1997. The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]

  5. Lincoln, R.J., 1979. British Marine Amphipoda: Gammaridea. London: British Museum (Natural History).

  6. MBA (Marine Biological Association), 1957. Plymouth Marine Fauna. Plymouth: Marine Biological Association of the United Kingdom.


  1. Bristol Regional Environmental Records Centre, 2017. BRERC species records within last 15 years. Occurrence dataset: https://doi.org/10.15468/vntgox accessed via GBIF.org on 2018-09-25.

  2. Cofnod – North Wales Environmental Information Service, 2018. Miscellaneous records held on the Cofnod database. Occurrence dataset: https://doi.org/10.15468/hcgqsi accessed via GBIF.org on 2018-09-25.

  3. NBN (National Biodiversity Network) Atlas. Available from: https://www.nbnatlas.org.

  4. OBIS (Ocean Biodiversity Information System),  2024. Global map of species distribution using gridded data. Available from: Ocean Biogeographic Information System. www.iobis.org. Accessed: 2024-06-16

  5. West Wales Biodiversity Information Centre, 2017. WTSWW Data: All Taxa (West Wales). Occurrence dataset: https://doi.org/10.15468/gaakk2 accessed via GBIF.org on 2018-10-02.


This review can be cited as:

Neish, A.H. 2003. Gammarus chevreuxi A gammarid shrimp. In Tyler-Walters H. and Hiscock K. Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 16-06-2024]. Available from: https://www.marlin.ac.uk/species/detail/1908

Last Updated: 28/05/2003