Zoanthus

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Zoanthus

Zoanthus is a genus of soft coral, anthozoans in the order Zoanthidae. It is the name genus for its family and order. Zoanthids are prized in the fishkeeping hobby, being relatively easy to raise and very colorful. Known as "button polyps", "zoos", or "zoas" they can spread to completely cover a rock with brightly colored circular patterns.