- Centraugaptilus horridus
- Centraugaptilus rattrayi
- Centrobotrys thermophila
- Centrocubus cladostylus
- Centropages brachiatus
- Centropages bradyi
- Centropages calaninus
- Centropages chierchiae
- Centropages elongatus
- Centropages gracilis
- Centropages kroyeri
- Centropages longicornis
- Centropages orsinii
- Centropages typicus
- Centropages velificatus
- Centropages violaceus
- Cephalobrachia macrochaeta
- Cephalospyris clathrobursa
- Cephea cephea
- Ceratocymba dentata
- Ceratocymba leuckarti
- Ceratocymba sagittata
- Cestum veneris
- Chaceon notialis
- Chaceon ramosae
- Chaenea teres
- Chalaraspidum alatum
- Challengeranium diodon
- Challengeria naresi
- Challengeria tritonis
- Challengeria xiphodon
- Challengeron channeri
- Challengeron radians
- Challengeron willemoesii
- Charybdis hellerii
- Chasmagnathus granulata
- Chasmocarcinus cylindricus
- Chasmocarcinus peresi
- Chasmocarcinus rathbuni
- Chasmocarcinus typicus
- Chelophyes appendiculata
- Chelophyes contorta
- Chiridiella atlantica
- Chiridius gracilis
- Chiridius polaris
- Chiridius poppei
- Chirodropus gorilla
- Chiropsalmus quadrumanus
- Chiroteuthis veranyi
- Chirundina streetsii