Caenogastropoda, Superorder
Calycophorae, Ordo
Calycopsidae, Familia
Campanulariida, Subordo
Campanulariidae, Familia
Campanulariinae, Subfamilia
Campanularioidea, Superfamilia
Campanulinida, Subordo
Campanulinoidea, Superfamilia
Campylaspis, Genus
Capitata, Ordo
Caprellida, Infraorder
Caprellidae, Familia
Caprellidea, Subordo
Caridea, Infraorder
Caridion, Genus
Carinaria, Genus
Carinariacea, Superfamilia
Carinariidae, Familia
Catablema, Genus
Cavoliniidae, Familia
Cavoliniinae, Subfamilia
Cephalochordata, Subphylum
Cephalopoda, Classis
Ceriantharia, Ordo
Cerianthidae, Familia
Cerianthus, Genus
Chaetognatha, Phylum
Cheirodonta, Genus
Cheliceriformes, Subphylum
Chelophyes, Genus
Chordata, Phylum
Chrysaora, Genus
Cirolanidae, Familia
Cirrata, Subordo
Cirripedia, Subclassis
Cirroteuthidae, Familia
Cirroteuthis, Genus
Cladocera, Ordo
Cladocopina, Subordo
Cladonema, Genus
Clavidae, Familia
Clio, Genus
Clioinae, Subfamilia
Clionacea, Superfamilia
Clione, Genus
Clionidae, Familia
Clytia, Genus
Clytiinae, Subfamilia
Cnidaria, Phylum
Coleoidae, Subclassis
Coleoidea, Subclassis
Conchoderma, Genus
Conchoecia, Genus
Conchoecilla, Genus
Conchoecinae, Subfamilia
Conchoecissa, Genus
Conica, Ordo
Copepoda, Subclassis
Coronatae, Ordo
Corymorpha, Genus
Corymorphidae, Familia
Coryne, Genus
Corynidae, Familia
Cosmetira, Genus
Cranchiidae, Familia
Crangon, Genus
Crangonidae, Familia
Crangonoidea, Superfamilia
Crustacea, Subphylum
Cryptocheles, Genus
Ctenophora, Phylum
Cumacea, Ordo
Cumella, Genus
Cumopsis, Genus
Cyamida, Infraorder
Cyamidae, Familia
Cyanea, Genus
Cyaneidae, Familia
Cyclaspis, Genus
Cyclocanna, Genus
Cyclomyaria, Ordo
– synonym of Doliolida, Ordo
Cyclomyaria | Uljanin, 1884, Ordo
– synonym of Doliolida, Ordo
Cydippida, Ordo
Cylindroleberidae, Familia
Cylindroleberinae, Subfamilia
Cymothoidae, Familia
Cypridinidae, Familia
Cypridininae, Subfamilia
Cystonectae, Ordo