The 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. One exception is the so-called bubble anemone – Entacmaea quadricolor.

The systematics of Actiniidae is often quite difficult. The problem with identification of genera within this family is that most species are readily distinguishable when alive but when fixated lose their color and some other features. Arrangement of tentacles is important in defining genera for Actiniaria families. There may be one tentacle per space between mesenteries or there may be more than one tentacle between each two mesenteries. Members of the family Actiniidae have one tentacle per space.

Genera

Genera in this family include:^[1]

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  Condylactis sp.

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  Isocradactis magna, Pakiri Beach, New Zealand

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  Isocradactis magna, Pakiri Beach, New Zealand