The jewel anemone (Corynactis viridis) 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).
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).
Ager, O.E.D. (2001) Corynactis viridis. Jewel anemone Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme. [On-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 27/11/2003]. Available on-line at: http://www.marlin.ac.uk/species/Corynactisviridis.htm
Of asexual reproduction: reproduction that does not involve the formation of sex cells (‘gametes’). In many species, asexual reproduction can occur by fission (or in plants ‘vegetative reproduction’); part of the organism breaks away and develops into a separate individual. Some animals, including vertebrates can develop from unfertilised eggs, this process, known as parthenogenesis gives rise to offspring that are genetically identical to the parent.
A marine zone between the littoral zone (the shallow zone where light reaches the bed, subject to submersion and exposure by tides) and depths of around 200m.
Ager, O.E.D. (2001) Corynactis viridis. Jewel anemone Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme. [On-line]. Plymouth: Marine Biological Association of the United Kingdom. (November, 2003) http://www.marlin.ac.uk/species/Corynactisviridis.htm
Fish, J.D. and Fish, S. (1989) A student’s guide to the seashore. Unwin Hyman Ltd., London.
Gibson, R., Hextall, B. and Rogers, A. (2001) Photographic Guide to the Sea & Shore Life of Britain and North-west Europe. Oxford University Press, Oxford.
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