Epiactis prolifera, the brooding, proliferating or small green anemone, is a species of marine invertebrate in the family Actiniidae.

It has a feature rare among animals in that all individuals start life as females but develop testes later in their lives to become hermaphrodites.

The young all start life as females but when the pedal disc is about two centimetres in diameter, they develop testes on the mesentery and spend the rest of their lives as hermaphrodites.

Sperm is released into the water column and after cross-fertilisation (or sometimes self-fertilisation), the young remain within the mother's gastrovascular cavity during their early development.

Predators include the nudibranch Aeolidia papillosa, the leather star Dermasterias imbricata[3] and certain fish, such as the mosshead sculpin (Clinocottus globiceps).

The anemone provides protection for the host from predators and itself benefits by being able to consume food fragments discarded by the crab.