laceration ’ process as it is called means there is a tendency for the different forms to occur in groups , these are usually far smaller and less distinct than the fabulous colour patchworks of jewel anemones .
My favourite and much more obvious example of ‘ basal laceration ’ is by the plumose anemone ( Metridium senile )* because its tall column means that the new little anemones it produces can be clearly seen clustered round its base . This species is particularly intriguing because it
Pieces of this large Plumose anemone have broken away to produce new youngsters around its base
Small clusters of white Elegant anemones with other colour forms less obvious among the encrusting life uses special fighting tentacles to lash out at rivals as it competes for space within large gatherings , but these attacks are selective . It does not strike at identical clone-mates ( such as offspring or siblings ) nor at individuals of the opposite sex . Instead , it is thought to use those same fighting tentacles to caress potential partners in a form of courtship that is a precursor to sexual reproduction .
When sea anemones reproduce sexually , they do it in a variety of ways and fertilisation can happen externally or within their bodies . If fertilisation is internal , the eggs are often retained in the parent and may be released as larvae or brooded until they form miniature new anemones . The method varies between species and even between different populations of the same species . To think sea anemones are sometimes described as simple !
* Plumose anemones are reported to have declined significantly in inshore waters around the Southwest of England in the last few ( approximately 5 ) years . Have you noticed that on your favourite scenic wreck or reef ? �
Close-up of Jewel anemone patchwork on a Cornish offshore reef
Paul ’ s photos and video clips capturing UK marine life stories are on Instagram @ paulnaylormarinephoto
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