1. A large class of sedentary marine coelenterates that includes sea anemones and corals; the medusoid phase is entirely suppressed
   - Anthozoa, class Anthozoa, class Actinozoa

1. Sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed
   "Coral reefs are primarily composed of actinozoans";
   - anthozoan

Type of: class, cnidarian, coelenterate

Part of: Cnidaria, Coelenterata, phylum Cnidaria, phylum Coelenterata

Encyclopedia: Actinozoa