| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Cryptasterias Verrill 1914 | 0 | 0 | 1 |
| Cryptolampros | 0 | 0 | 1 |
| Cryptopsaras | 0 | 0 | 1 |
| Cryptostomias | 0 | 0 | 1 |
| Ctenochirichthys | 0 | 0 | 1 |
| Ctenophora (comb jellies) | 22 | 0 | 0 |
| Ctenopteryx | 0 | 0 | 1 |
| Cunina Eschscholtz 1829 | 0 | 0 | 1 |
| Curtos | 0 | 0 | 1 |
| Cyclosalpa de Blainville 1827 | 0 | 0 | 0 |
| Cycloteuthis Joubin 1919 | 0 | 0 | 1 |
| Cyclothone | 0 | 0 | 1 |
| Cydistus | 0 | 0 | 1 |
| Cyphocaris Boeck 1871 | 0 | 0 | 1 |
| Cypridina | 0 | 0 | 1 |
