with respect to the Anthozoa
- sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is totally repressed
- with respect to the Anthozoa.
- among Anthozoa.
(a.) related to the Anthozoa.
- (letter.) One of several Anthozoa.
In Actinia, as in all Anthozoan zooids, the coelenteron is not a simple cavity, as in a Hydroid, but is divided by a number of radial folds or curtains of soft tissue into a corresponding number of radial chambers.