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Branching among the colonies is due to the settling of actinulae on adjacent stems of the parent colony, the annulated stem of the young hydranth forming the base of the new branch. There is a tendency for all hydranths on the one colony to be the same sex; however, both male and female may occur on the one colony.

Both the hydranth and blastostyles are very active, the pendulous blastostyles performing rhythmic lashing movements at intervals.


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Watson, Jeanette

Source: Cnidaria Lifedesk

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