A mud shrimp (Apocorophium lacustre)

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



A small amphipod that grows up to 6 mm. The body is subcylindrical and depressed. It has small eyes that are situated on extensions of the head.

Recorded distribution in Britain and Ireland

Wash, Norfolk Broadlands, English Channel and southern Welsh coasts.

Global distribution



Constructs mud tubes on hydroids, submerged vegetation and other surfaces in fresh or slightly brackish waters.

Depth range


Identifying features

  • Head with triangular rostrum, especially pronounced in male.
  • Urosome segments fused; lateral ridge distinct, uropods 1 and 2 inserted ventrally.
  • Gnathopod 1 palm transverse, evenly convex.
  • Uropod 1 peduncle outer margin with 7-8 spines, inner margin with 1 distal spine; uropod 2 peduncle inner margin with 1 distal spine, outer margin with 3-5 setae.

Additional information

No text entered

Listed by

- none -


  1. Barnes, R.S.K., 1994. The brackish-water fauna of northwestern Europe. Cambridge: Cambridge University Press.

  2. Bratton, J. H. (ed.), 1991. British Red Data Books: 3. Invertebrates other than insects. Peterborough: Joint Nature Conservation Committee.

  3. 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.]

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


  1. Centre for Environmental Data and Recording, 2018. Ulster Museum Marine Surveys of Northern Ireland Coastal Waters. Occurrence dataset https://www.nmni.com/CEDaR/CEDaR-Centre-for-Environmental-Data-and-Recording.aspx accessed via NBNAtlas.org on 2018-09-25.

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

  3. Norfolk Biodiversity Information Service, 2017. NBIS Records to December 2016. Occurrence dataset: https://doi.org/10.15468/jca5lo accessed via GBIF.org on 2018-10-01.

  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: 2024-06-23


This review can be cited as:

Wilson, E. 2002. Apocorophium lacustre A mud 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 23-06-2024]. Available from: https://www.marlin.ac.uk/species/detail/1208

Last Updated: 11/10/2002