Jewel anemone  (Corynactis viridis)

Asexually: 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.
Sublittoral: 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.

1. National Biodiversity Network Species Dictionary (September, 2003)
   http://www.nhm.ac.uk/nbn/
   
2. Fish, J.D. and Fish, S. (1989) A student's guide to the seashore. Unwin Hyman Ltd., London.
   
3. 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
   
4. 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.
   
5. Picton, B.E. and Morrow, C.C. (2002) [In] Encyclopaedia of Marine Life of Britain and Ireland. (September, 2003)
   http://www.habitas.org.uk/marinelife/species.asp?item=D13570