Fairy shrimp (Chirocephalus diaphanus)

loading
Male fairy shrimp
loading
Loading more images and videos...

Fairy shrimp fact file

Fairy shrimp description

KingdomAnimalia
PhylumArthropoda
ClassCrustacea
OrderAnostraca
FamilyChirocephalidae
GenusChirocephalus (1)

The fairy shrimp is a beautiful, translucent crustacean, which lacks a carapace, and is considered to be rather primitive as it has a relatively large number of segments and the legs are not specialised (5). The body is elongated, and bears 11 pairs of legs fringed with bristles; the head curves downwards, and in males the second pair of antennae are modified 'claspers' for grabbing females during mating (6). Fairy shrimps swim around on their backs, propelled by the constantly moving legs (5).

Size
Body length: 25 mm (2)
Top

Fairy shrimp biology

The fairy shrimp has been found throughout the year, and has even been found in ice-covered water (3). It feeds on microscopic animals and organic particles, which are either taken from the water with the legs or scraped from the bottom of the pond (3). It has an extremely fast life-cycle, and fairy shrimp eggs are able to survive when the temporary pond habitat dries out; when they become wet once more they hatch, but some eggs remain dormant so that if conditions quickly deteriorate again, some eggs will survive (3). Various animals, including ponies, deer and cattle disperse the eggs from pool to pool (3).

Top

Fairy shrimp range

This is the only fairy shrimp in Britain; it has formerly been recorded throughout much of England as far north as York, but has more recently become restricted to Devon, Cornwall, the New Forest, and Cambridgeshire (3). Elsewhere, it is found in continental Europe (3).

You can view distribution information for this species at the National Biodiversity Network Gateway.
Top

Fairy shrimp habitat

This species inhabits temporary pools, ranging from ponds to muddy ruts, and shows a preference for sites that are subject to regular disturbance by vehicles, livestock, or ploughing (livestock also enrich the site with their dung). The fairy shrimp cannot co-exist with fish and has a broad tolerance of varying levels of temperature, oxygen levels and water chemistry (3).

Top

Fairy shrimp status

Classified as Vulnerable in the British Red Data Book (3), fully protected in the UK under Schedule 5 of the Wildlife and Countryside Act 1981 and listed as a Species of Conservation Concern under the UK Biodiversity Action Plan, although not a priority species (4).

Top

Fairy shrimp threats

A main threat facing the fairy shrimp is the perception of its habitats as 'unsightly'; temporary pools are often infilled or converted to permanent ponds. Furthermore, water abstraction, causing a lowering of the water table and a loss of suitable habitat has also occurred at some sites. In the early 20th century, the fairy shrimp was known from common land in Buckinghamshire and Hertfordshire, but the decline of traditional grazing on the commons has eliminated suitable habitat through conversion to scrub and woodland (3).

Top

Fairy shrimp conservation

Several colonies of the fairy shrimp are located within Sites of Special Scientific Interest (SSSIs), however this does not seem to protect this species. Suitable habitats need active management, and cattle trampling and grazing should be encouraged (3). The fairy shrimp is fully protected in the UK under Schedule 5 of the Wildlife and Countryside Act 1981 and listed as a Species of Conservation Concern under the UK Biodiversity Action Plan, although not a priority species (2).

There may be further information about this species available via the National Biodiversity Network Gateway.
View information on this species at the UNEP World Conservation Monitoring Centre.
Top

Find out more

For more on this species see: British Red Data Books 3: Invertebrates other than insects (JNCC).
For more on invertebrates and their conservation see Buglife, the Invertebrate Conservation Trust at:
http://www.buglife.org.uk/

You can see the fairy shrimp by visiting the Salisbury Plain:

Top

Authentication

This information is awaiting authentication by a species expert, and will be updated as soon as possible. If you are able to help please contact:
arkive@wildscreen.org.uk

Top

Glossary

Carapace
The top shell of a turtle. In arthropods (insects, crabs etc), the fused head and thorax (the part of the body located near the head) also known as ‘cephalothorax’.
Top

References

  1. National Biodiversity Network Species Dictionary (Jan 2003):
    http://www.nhm.ac.uk/nbn/
  2. Macan, T. T. (1959) A guide to freshwater invertebrate animals. Longmans, Green & Co Ltd., London.
  3. Joint Nature Conservation Committee (1991) British Red Data Books 3: Invertebrates other than insects. JNCC, Peterborough.
  4. The Environment Agency (1998) Species and Habitats Handbook: look-up chart of species and their legal status. Environment Agency, Bristol.
  5. Nichols, D., Cooke, J. & Whiteley, D. (1971) The Oxford Book of Invertebrates. Oxford University Press, Oxford.
  6. Olsen, L., Sunesen, J., & Pedersen, B. V. (1999) Small freshwater creatures. Oxford University Press, Oxford.
X
Close

Image credit

Male fairy shrimp  
Male fairy shrimp

© Richard Manuel / gettyimages.com

Getty Images
101 Bayham Street
London
NW1 0AG
United Kingdom
Tel: +44 (0) 800 376 7981
sales@gettyimages.com
http://www.gettyimages.com

X
Close

Link to this photo

ARKive species - Fairy shrimp (Chirocephalus diaphanus) Embed this ARKive thumbnail link ("portlet") by copying and pasting the code below.

Terms of Use - The displayed portlet may be used as a link from your website to ARKive's online content for private, scientific, conservation or educational purposes only. It may NOT be used within Apps.

Read more about

X
Close

MyARKive

MyARKive offers the scrapbook feature to signed-up members, allowing you to organize your favourite ARKive images and videos and share them with friends.

Play the Team WILD game:

Team WILD, an elite squadron of science superheroes, needs your help! Your mission: protect and conserve the planet’s species and habitats from destruction.

Conservation in Action

Which species are on the road to recovery? Find out now »

Help us share the wonders of the natural world. Donate today!

Blog RSS