Overview

Comprehensive Description

Description

A small active brittle star with banded arms. Usually grey in colour with darker bands on the arms, which are not as tapered and longer relative to the disc than in other Ophiura species. The disc is covered with large circular plates edged with smaller plates. These small plates are often darker than the large ones, emphasising the pattern on the disc. There are arm combs of 7-9 short flat papillae and 3 slender arm spines. Disc 6mm., arms 4.5x disc diameter. Other Ophiura species are similar but generally have shorter arms.
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© National Museums Northern Ireland and its licensors

Source: Encyclopedia of Marine Life of Britain and Ireland

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Distribution

In depths from 8 to more than 200 m, on muddy sand, all round the British Isles
  • Southward, E.C.; Campbell, A.C. (2006). [Echinoderms: keys and notes for the identification of British species]. Synopses of the British fauna (new series), 56. Field Studies Council: Shrewsbury, UK. ISBN 1-85153-269-2. 272 pp.
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© WoRMS for SMEBD

Source: World Register of Marine Species

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In shallow water this species has been found abundantly in some Scottish sea lochs. It has been recorded from deep water all round the British Isles.
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© National Museums Northern Ireland and its licensors

Source: Encyclopedia of Marine Life of Britain and Ireland

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Ecology

Habitat

Depth range based on 353 specimens in 1 taxon.
Water temperature and chemistry ranges based on 324 samples.

Environmental ranges
  Depth range (m): 0 - 490
  Temperature range (°C): 4.804 - 11.836
  Nitrate (umol/L): 2.055 - 12.125
  Salinity (PPS): 33.544 - 35.579
  Oxygen (ml/l): 5.561 - 6.725
  Phosphate (umol/l): 0.353 - 0.858
  Silicate (umol/l): 2.118 - 6.295

Graphical representation

Depth range (m): 0 - 490

Temperature range (°C): 4.804 - 11.836

Nitrate (umol/L): 2.055 - 12.125

Salinity (PPS): 33.544 - 35.579

Oxygen (ml/l): 5.561 - 6.725

Phosphate (umol/l): 0.353 - 0.858

Silicate (umol/l): 2.118 - 6.295
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Lives on silt-covered rocks and firm silty substrata.
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Source: Encyclopedia of Marine Life of Britain and Ireland

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Life History and Behavior

Behavior

Breeding

Ophipluteus larva. Summer
  • Southward, E.C.; Campbell, A.C. (2006). [Echinoderms: keys and notes for the identification of British species]. Synopses of the British fauna (new series), 56. Field Studies Council: Shrewsbury, UK. ISBN 1-85153-269-2. 272 pp.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Ophiocten affinis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 8
Species With Barcodes: 1
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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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