A taxonomic order of soft corals and sea pens that includes many colorful marine organisms found in oceans worldwide.
From alcyon- (sea coral) plus the taxonomic suffix -acea, following scientific Latin naming conventions established by Linnaeus and other naturalists in the 17th-18th centuries.
Sea pens, which belong to this group, look like quill pens and can create light shows by releasing millions of glowing particles when disturbed—they're basically underwater light-up toys!
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