BIOTIC Species Information for Ciona intestinalis
Click here to view the MarLIN Key Information Review for Ciona intestinalis
Researched byAngus Jackson Data supplied byMarLIN
Refereed byDr John Bishop
Distribution and Habitat
Distribution in Britain & IrelandWidely distributed round British and Irish coasts.
Global distributionWidely distributed throughout temperate regions of the world.
Biogeographic rangeNot researched Depth rangeLower shore to at least 500 m
MigratoryNon-migratory / Resident   
Distribution Additional InformationGrowths of the hydroid %Tubularia larynx% may greatly enhance the settlement and may be a causative factor for ascidian blooms (Schmidt, 1983). Ciona intestinalis is believed to have originated as a North Atlantic species but has spread widely through shipping to all temperate regions.

Substratum preferencesOther species (see additional information)
Algae
Artificial (e.g. metal/wood/concrete)
Bedrock
Large to very large boulders
Small boulders
Physiographic preferencesOpen coast
Offshore seabed
Strait / sound
Sealoch
Ria / Voe
Estuary
Enclosed coast / Embayment
Biological zoneUpper Infralittoral
Lower Infralittoral
Upper Circalittoral
Lower Circalittoral
Wave exposureModerately Exposed
Sheltered
Very Sheltered
Extremely Sheltered
Ultra Sheltered
Tidal stream strength/Water flowModerately Strong (1-3 kn)
Weak (<1 kn)
Very Weak (negligible)
SalinityFull (30-40 psu)
Reduced (18-30 psu)
Variable (18-40 psu)
Habitat Preferences Additional Information
Distribution References Svane & Havenhand, 1993, Schmidt, 1983, Havenhand & Svane, 1991, Naranjo et al., 1996, Millar, 1970, Fox, 1994(a), Branch et al., 1994,
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