Butterfly-Wing Sand Shell 
Cadlinella ornatissima 
Caloria indica 
Candy nudibranch 
Carlsonhoff's Phyllidia 
Carminodoris estrelyado 
Carolina mantleslug 
Cart-Rut Shell 
Carthusian Snail 
Cerastoma tenue 
Ceratosoma amoenum 
Ceratosoma gracillimum 
Cerberilla ambonensis 
Changeable Mantleslug 
Channeled applesnail 
Checkered Nerite 
Checkered Periwinkle 
Chestnut Slug 
Chinese mystery snail 
Chloraea intorta 
Chocolate banded cowry 
Chocolate Spotted Auger 
Chocolate-band Snail 
Chromodoris alcalai