Actinioidea

Actiniidae is the largest family of sea anemones, to which most common, temperate, shore species belong. Most members of this family do not participate in symbioses with fishes. Three exceptions are the bubble-tip anemone (with anemonefish and certain cardinalfish), snakelocks anemone (with Incognito goby) and Urticina piscivora (with painted greenling).

Phymanthidae is a family of sea anemones belonging to the order Actiniaria.

Thalassianthidae is a family of sea anemones that contains the genera Actineria, Cryptodendrum, Heterodactyla, and Thalassianthus. These sea anemones do not host any varieties of clownfishes, but have been associated with some species of commensal anemone shrimp.

Haloclavidae is a family of sea anemones. Members of the family are found worldwide and many live largely buried in soft substrates with only their oral disc and tentacles protruding.

Condylanthidae is a family of sea anemones belonging to the order Actiniaria.

Minyadidae is a family of sea anemones belonging to the order Actiniaria.

Preactiniidae is a family of sea anemones in the order Actiniaria The family contains two species in two monotypic genera.

Actinioidea is a superfamily of sea anemones in the order Actiniaria.

Liponematidae is a family of sea anemones.

Andresiidae is a family of sea anemones belonging to the order Actiniaria.

Limnactiniidae is a family of sea anemones belonging to the order Actiniaria.

Oractiidae is a family of sea anemones belonging to the order Actiniaria.

Capneidae is a family of cnidarians belonging to the order Actiniaria.

Iosactinidae is a family of sea anemones belonging to the order Actiniaria.

Homostichanthidae is a family of sea anemones belonging to the order Actiniaria.

Actinodendridae is a family of cnidarians belonging to the order Actiniaria.