Cocos Island flounder Cocos pygmygoby Cocos stargazer Cocos triplefin Cocos wrasse Cocos-Keeling angelfish Cocosoda catfish Code goby Codheaded rattail Codlet Codling Coelacanth Coffee-bean tetra Coffin ray Cohen's mudbrotula Cohen's whiptail Coho salmon Coitor croaker Colchic khramulya Colchic nase Colclough's shark Coldwater darter Coleman's pygmy seahorse Cole's rockskipper Colin's damsel Colin's fairygoby Collar carpetshark Collared dottyback Collared eel Collared large-eye bream Collared seahorse Collette's basslet Collette's coralblenny Collette's herring Collette's viviparous brotula Colombian blenny Colombian goby Colombo damsel Colon goby Colonial cusk-eel Colorado pikeminnow Colorado River Cutthroat Trout Colorado snapper Coloured righteye flounder Comanche Springs pupfish Comb bandfish Comb flounder Comb goby Comb grouper Comb rockling