-
Chimaeridae – Rabbitfishes
Family, Cartilagenous fish (Chondrichthyes), Marine
-
Chlamydoselachidae – Frilled sharks
Family, Cartilagenous fish (Chondrichthyes), Marine
-
Clupeidae
Family, Bony fish (Actinopterygii), Marine, terrestrial
-
Congridae – Conger eels
Family, Bony fish (Actinopterygii), Marine
-
Cottidae
Family, Bony fish (Actinopterygii), Marine, terrestrial
-
Cyclopteridae
Family, Bony fish (Actinopterygii), Marine
-
Cynoglossidae
Family, Bony fish (Actinopterygii), Marine
-
Cyprinidae
Family, Bony fish (Actinopterygii), Marine, terrestrial
-
Dactylopteridae
Family, Bony fish (Actinopterygii), Marine
-
Dalatiidae
Family, Cartilagenous fish (Chondrichthyes), Marine
-
Dasyatidae
Family, Cartilagenous fish (Chondrichthyes), Marine
-
Derichthyidae – Longneck eels
Family, Bony fish (Actinopterygii), Marine
-
Diretmidae – Spinyfins
Family, Bony fish (Actinopterygii), Marine
-
Echeneidae
Family, Bony fish (Actinopterygii), Marine
-
Echinorhinidae – Bramble sharks
Family, Cartilagenous fish (Chondrichthyes), Marine
-
Engraulidae
Family, Bony fish (Actinopterygii), Marine
-
Epigonidae – Deep-water cardinalfishes
Family, Bony fish (Actinopterygii), Marine
-
Etmopteridae
Family, Cartilagenous fish (Chondrichthyes), Marine
-
Eurypharyngidae – Pelican eels
Family, Bony fish (Actinopterygii), Marine
-
Evermannellidae – Sabretooth fishes
Family, Bony fish (Actinopterygii), Marine