Biodiversity & Conservation

Hooded shrimp - Athanas nitescens

Athanas nitescens

Image David Fenwick - Hooded shrimp in a tide pool. Image width ca XX cm
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Distribution map

Athanas nitescens recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)

Why do the maps differ?

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Athanas nitescens is not listed under any importance categories.

Taxonomy icon Taxonomy Taxon English term
Phylum Arthropoda Arthropods, joint-legged animals, e.g. insects, crustaceans & spiders
Class Malacostraca Crabs, lobsters, sand hoppers and sea slaters
Authority Leach, 1814
Recent synonyms None
Map icon Recorded Distribution in Britain and Ireland Widely recorded around the south and west coasts of Britain, and the east and west coasts of Ireland. Recorded once in the north east.
Habitat information icon Habitat information Found on the lower shore to depths 60 m, primarily beneath stones where the substratum is gravelly. Also found under algae.
Text page icon Description Athanas nitescens is a small shrimp measuring up to 2 cm in length. Its colour varies from green-blue, or red-brown, and can also be transparent and speckled with red chromatophores. The rostrum is well developed, straight, unarmed, projecting beyond segment one of antenna one, with an acutely pointed apex. Two anterior projections (bearing two lateral spines, and a small dorsal lobe) of the carapace particularly cover the eyes dorsally, hence the name hooded shrimp. The first pereiopod's (thoracic limbs) are larger than the second, symmetrical in females and predominantly asymmetrical in males. Females chelae are also slimmer than the males. The telson forming the tailfan with the uropods have two pairs of lateral spines, as well as an articulated process on pleonite six at the base of the uropods.
Identifying features
  • Distinctive white dorsal strip extended full body length.
  • Colour variable; green-blue, or red-brown.
  • Up to 2 cm in length.
  • Well developed rostrum with acutely pointed apex.
Additional information icon Additional information This species is often found in groups of adults and juveniles. Ovigerous females occur from May through to September.

This review can be cited as follows:

Sonia Rowley 2008. Athanas nitescens. Hooded shrimp. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 26/11/2015]. Available from: <>