Metridioidea

Metridioidea is a superfamily of sea anemones in the order Actiniaria. Members of this clade live in shallow subtropical waters worldwide.

== List of families == Families in the superfamily Metridioidea include: Family Acontiophoridae Family Acricoactinidae Family Actinoscyphiidae Family Aiptasiidae Family Aiptasiomorphidae Family Aliciidae Family Amphianthidae Family Andvakiidae Family Antipodactinidae Family Bathyphelliidae Family Boloceroididae Family Diadumenidae Family Gonactiniidae Family Halcampidae Family Haliactinidae Family Hormathiidae Family Isanthidae Family Kadosactinidae Family Metridiidae Family Nemanthidae Family Nevadneidae Family Octineonidae Family Ostiactinidae Family Phelliidae Family Sagartiidae Family Sagartiomorphidae Family Spongiactinidae