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
There are over 300 recognized species in 57 genera in Actiniidae. Genera in this family include:
↑Fretwell, K.; and B. Starzomski (2014). Painted greenling.Archived 15 November 2018 at the Wayback Machine Biodiversity of the Central Coast. Retrieved 29 January 2015.