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Diplasterias brucei (Koehler, 1908)

provided by British Antarctic Survey

Description

Diplasterias brucei normally has five arms, but there is a 6-armed form common at South Georgia. Colour is very variable, from pale blue-green to yellow or orange and it grows to a size of around 25cm across.

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Species details

Benthic Community at McMurdo Sound 1974. Adaptations within Antarctic Ecosystems SCAR3.

Photos

  • Diplasterias brucei - Diplasterias brucei - Philippe Pernet
  • Diplasterias brucei - Diplasterias brucei - Philippe Pernet
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Species distribution

0 to 725m on a variety of substrates from Sub-Antarctica and South Georgia to the Antarctic Peninsula and Continent.

Unlike many seastars, Diplasterias brucei does not appear to eat sponges. Its primary food source is molluscs, and in particular the bivalve Limatula hodgsoni, but it will also scavenge on dead matter. It is eaten by the anemone Urticinopsis antarctica. Diplasterias brucei broods its young until they are fully developed into juvenile seastars.

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