Calliactis, Genus
Caryophyllia, Genus
Caryophylliidae, Familia
Caryophylliinae, Subfamilia
Ceriantharia, Ordo
Cerianthidae, Familia
Cerianthus, Genus
Clavulariidae, Familia
Cnidaria, Phylum
Corallimorpharia, Ordo
Corallimorphidae, Familia
Corynactis, Genus