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Overview

Brief Summary

Biology

colonial; fixed gonophores
  • UNESCO-IOC Register of Marine Organisms
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© WoRMS for SMEBD

Source: World Register of Marine Species

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Comprehensive Description

Description

This hydroid consists of fine, sparsely branched stems bearing paired hydrothecae. The hydrothecae are triangular in shape, with a hair-like outer cusp. The stems are usually clustered into small bushes, and are golden-brown in colour. Typically colonies measure 100mm in height. This is a distinctive species, with finer branches than most Sertulariid hydroids.
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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

semi-cosmopolitan
  • UNESCO-IOC Register of Marine Organisms
Creative Commons Attribution 3.0 (CC BY 3.0)

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Source: World Register of Marine Species

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Widespread on western coasts of the British Isles.
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© 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 35 specimens in 1 taxon.
Water temperature and chemistry ranges based on 9 samples.

Environmental ranges
  Depth range (m): 0 - 472
  Temperature range (°C): -0.245 - 16.940
  Nitrate (umol/L): 1.146 - 11.245
  Salinity (PPS): 29.197 - 35.385
  Oxygen (ml/l): 5.757 - 7.462
  Phosphate (umol/l): 0.057 - 1.096
  Silicate (umol/l): 2.643 - 8.393

Graphical representation

Depth range (m): 0 - 472

Temperature range (°C): -0.245 - 16.940

Nitrate (umol/L): 1.146 - 11.245

Salinity (PPS): 29.197 - 35.385

Oxygen (ml/l): 5.757 - 7.462

Phosphate (umol/l): 0.057 - 1.096

Silicate (umol/l): 2.643 - 8.393
 
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This species is especially characteristic of the infralittoral zone where strong wave action or tidal streams are present. It normally grows on stipes of the kelp, Laminaria hyperborea, but may also attach directly to bedrock.
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© National Museums Northern Ireland and its licensors

Source: Encyclopedia of Marine Life of Britain and Ireland

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General Ecology

Ecology

The nudibranch Doto eireana feeds exclusively on this hydroid.
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© National Museums Northern Ireland and its licensors

Source: Encyclopedia of Marine Life of Britain and Ireland

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