Overview

Comprehensive Description

Description

This sponge is usually white to cream in colour but occasionally pale brown individuals occur. It is flat, like a small hot water bottle and open at one end, it may also be tubular, or composed of contorted flat lobes, with a very short stalk. The surface of the sponge is smooth and clean. This species may be confused with Scypha ciliata which is also whitish in colour and tubular, however in S. ciliata the surface is hairy and there is a crown of spicules around the open end of the tube.
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Source: Encyclopedia of Marine Life of Britain and Ireland

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Distribution

A common species on all coasts of the British Isles.
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Source: Encyclopedia of Marine Life of Britain and Ireland

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Ecology

Habitat

Depth range based on 112 specimens in 1 taxon.
Water temperature and chemistry ranges based on 17 samples.

Environmental ranges
  Depth range (m): 0 - 31
  Temperature range (°C): 11.377 - 12.348
  Nitrate (umol/L): 4.729 - 7.121
  Salinity (PPS): 35.184 - 35.363
  Oxygen (ml/l): 6.069 - 6.233
  Phosphate (umol/l): 0.336 - 0.439
  Silicate (umol/l): 2.315 - 3.285

Graphical representation

Depth range (m): 0 - 31

Temperature range (°C): 11.377 - 12.348

Nitrate (umol/L): 4.729 - 7.121

Salinity (PPS): 35.184 - 35.363

Oxygen (ml/l): 6.069 - 6.233

Phosphate (umol/l): 0.336 - 0.439

Silicate (umol/l): 2.315 - 3.285
 
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Usually found on the low shore beneath overhangs, but is also common in the shallow sublittoral attached to kelp stipes or other algae.
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Wikipedia

Grantia compressa

Grantia compressa is a species of calcareous sponge belonging to the family Grantiidae. It is a very common species of rocky shores along the Atlantic coasts of Europe from France northwards.

It appears as flattened, purse-shaped vases up to 5 cm long with slit-like oscula at the ends, hanging downwards attached by a stalk to rocky overhangs, often in groups among seaweed. This is a pale sponge ranging in colour from grey to yellow.

References[edit]


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