Chromodoris alcalai 
Chromodoris colemani 
Chromodoris elisabethina 
Chromodoris hamiltoni 
Chromodoris joshi 
Chromodoris kalawakan 
Chromodoris magnifica 
Chromodoris strigata 
Clear Sundial 
Cochlicella conoidea 
Cochlodina laminata 
Cockscomb oyster 
Coconut octopus 
Coi's Goniobranchus 
Coleman's Melibe 
Collingwood's Goniobranchus 
Colpodaspis thompsoni 
Common Atlantic Slippersnail 
Common blanket octopus 
Common cockle 
Common cuttlefish 
Common Egg Cowrie 
Common European Ambersnail 
Common European limpet