Definition of zoantharian
: any of a subclass (Hexacorallia synonym Zoantharia) of anthozoans having tentacles or septa or both that are typically six or a multiple of six in number and including most of the recent corals and sea anemones
Recent Examples of zoantharian from the Web
But S. exilis, discovered off the coast of a southern Japanese island and described in ZooKeys in July, is one of only four solitary-living zoantharians.
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