Cratena affinis 
Cratena simba 
Cratena Slug 
Craven Door-Snail 
Creeper 
Crenavolva aureola 
Crested Mudalia 
Crested Nembrotha 
Cristataria haasi 
Crowned Nudibranch 
Cryptozona bistrialis 
Cupedora bednalli 
Cuspivolva formosa 
Cut through shell 
Cuthonga kanga 
Cyclophorus perdix 
Cyerce elegans 
Cyerce kikutarobabai 
Cystopelta purpurea 
Dark-spotted Auger 
Decollate snail 
Decumbent Spanish Dancer 
Dendrodoris carbunculosa 
Dendrodoris denisoni