An alternative or Latin plural form of hexacoralla, referring to the taxonomic group of six-rayed corals and sea anemones.
From 'hexacoralla' with '-ia' as a Latin neuter plural ending. Scientific nomenclature often uses multiple forms for the same taxon depending on historical convention and regional usage.
This is the 'fancy Latin plural' version of the same thing—scientists sometimes argue about whether to use '-a' or '-ia' endings, which seems petty until you realize it clarifies which ancient naming system you're using.
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