Cortez rainbow wrasse 
Corythoichthys nigripectus 
Cosmetic Wrasse 
Cottonmouth jack 
Cottonwick grunt 
Crab-eyed Goby 
Creole Wrasse 
Crevalle jack 
Crinoid clingfish 
Crocodile Flathead 
Crocodile snake eel 
Crocodilefish 
Cross's Damselfish 
Crown Squirrelfish 
Crystallichthys matsushimae 
Ctenochaetus flavicauda 
Cubera snapper 
Cutlips minnow 
Cyphotilapia gibberosa 
Dark-banded fusilier 
Dark-Fin Chromis 
Dash-and-dot goatfish 
Dendritic Jawfish 
Denises pygmy seahorse