Overview

Brief Summary

Biology

This anemone is often found in very large aggregations in suitable habitats, particularly on vertical surfaces (2). It reproduces asexually by means of 'longitudinal fission', in which means that individuals spilt in half. Sometimes this fission is not complete and two anemones may remain partially attached (5).
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Description

The jewel anemone is so-called because of its spectacular colouration. Individuals may be bright green, orange, red, pink or white and the tentacles and their tips are typically contrasting colours (3). The body of this anemone, correctly known as the 'column' is smooth, and has a rather squat appearance (3). Up to 100 tentacles, each terminating in a small swelling, are arranged in three rings around the mouth, which is situated at the top of a small cone (4).
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Comprehensive Description

Description

 This is a short and squat anemone with a smooth column. The anemone has up to 100 tentacles, each ending in a small knob. Corynactis viridis is brilliantly coloured and can be green, pink, red, orange or white in various combinations. Usually the disc, tentacles and tentacle tips are contrasting colours.
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Description

A small clonal anemone with a smooth column up to 15mm in height and diameter. The disc is wide, the tentacles have rounded knobs at their tips, up to 100 in number. the colour is often brilliant green, red, pink, orange, white or brown, in various combinations, usually the tentacle knobs contrast with the colour of the column. Reproduces by longitudinal fission, ie. dividing in half vertically. Sometimes the resulting anemones do not separate completely. The cup-corals Caryophyllia smithii and Caryophyllia inornata also have knobbed tentacles of similar appearance, but they possess hard calcareous skeletons.
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Distribution

Frequent on south and west coasts as far north as northern Scotland; also occurs around southwest Europe and in the Mediterranean.
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Range

This anemone is common on the south and western coasts of Britain (4) and reaches the northern extreme of its range in the Shetland Isles (3). It is found as far south as the Mediterranean (4).
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Ecology

Habitat

coastal
  • UNESCO-IOC Register of Marine Organisms
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Depth range based on 254 specimens in 2 taxa.
Water temperature and chemistry ranges based on 66 samples.

Environmental ranges
  Depth range (m): 0 - 100
  Temperature range (°C): 8.316 - 20.983
  Nitrate (umol/L): 0.176 - 9.753
  Salinity (PPS): 35.008 - 38.654
  Oxygen (ml/l): 5.187 - 6.437
  Phosphate (umol/l): 0.089 - 0.737
  Silicate (umol/l): 0.910 - 4.405

Graphical representation

Depth range (m): 0 - 100

Temperature range (°C): 8.316 - 20.983

Nitrate (umol/L): 0.176 - 9.753

Salinity (PPS): 35.008 - 38.654

Oxygen (ml/l): 5.187 - 6.437

Phosphate (umol/l): 0.089 - 0.737

Silicate (umol/l): 0.910 - 4.405
 
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 Corynactis viridis occurs from the lower shore and into the subtidal to about 50 m (sometimes to 80 m) on rocks, in caves and beneath overhangs where it is shaded from light. The anemone is often found in dense aggregations especially on vertical rock faces.
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Lives on rocks, occurring in shaded places low on the shore, or sublittorally down to about 50m, always in strong wave action or tidal streams. Usually occurs in large aggregations consisting of patches of similarly coloured clones.
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Found on rocks in shaded places such as beneath overhangs and in crevices on the lower shore (2), extending down to the sublittoral to depths of about 80 m (3).
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Conservation

Conservation Status

Status

Not threatened (2).
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Threats

This species is not threatened.
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Management

Conservation

Not relevant.
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