|Researched by||Olwen Ager||Refereed by||Admin|
|Other common names||-||Synonyms||-|
This anemone has a broad (up to 5 cm in diameter) base, which is moderately or firmly adhesive, with a smooth column. It has up to 192 tentacles arranged into 6 circles. The tentacles readily retract if the animal is disturbed. Actinia equina is uniform in colour, with no pattern on the disk, and can be red, brown, green or orange in colour. Bright blue wart like spots, called acrorhagi, are often found round the inside of the top margin of the column.
Actinia equina displays aggressive behaviour towards neighbouring individuals. This aggressive behaviour is stimulated when the tentacles of adjacent anemones come into contact. The aggressor stings the victim with nematocysts, in the acrorhagi, which leads to the victim either crawling away or dropping off the substratum. The strawberry anemone, Actinia fragacea, is more plump than Actinia equina and is red to reddish brown in colour with greenish spots (Manuel, 1988).
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Bruce, J.R., Colman, J.S. & Jones, N.S., 1963. Marine fauna of the Isle of Man. Liverpool: Liverpool University Press.
Fish, J.D. & Fish, S., 1996. A student's guide to the seashore. Cambridge: Cambridge University Press.
Hayward, P., Nelson-Smith, T. & Shields, C. 1996. Collins pocket guide. Sea shore of Britain and northern Europe. London: HarperCollins.
Hayward, P.J. & Ryland, J.S. (ed.) 1995b. Handbook of the marine fauna of North-West Europe. Oxford: Oxford University Press.
Howson, C.M. & Picton, B.E., 1997. The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]
JNCC (Joint Nature Conservation Committee), 1999. Marine Environment Resource Mapping And Information Database (MERMAID): Marine Nature Conservation Review Survey Database. [on-line] http://www.jncc.gov.uk/mermaid
Manuel, R.L., 1988. British Anthozoa. London: Academic Press.[Synopses of the British Fauna, no. 18.]
Picton, B.E. & Costello, M.J., 1998. BioMar biotope viewer: a guide to marine habitats, fauna and flora of Britain and Ireland. [CD-ROM] Environmental Sciences Unit, Trinity College, Dublin.
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Last Updated: 29/04/2008
Tags: Sea anemone beadlet anemone