Identification keys available for Order Anguilliformes
| Key | Title |
| 9 | Key to the freshwater eels of southern Africa. |
| 58 | Key to the types of non-exterilium larvae (Congridae) of the Western North and Central Pacific. |
| 124 | Key to the species of freshwater eels (Anguillidae) occuring in Western Central Pacific. |
| 125 | Key to the genera of spaghetti eels (Moringuidae) occuring in Western Central Pacific. |
| 126 | Key to the genera of false morays (Chlopsidae) occuring in Western Central Pacific. |
| 127 | Key to the subfamilies of morays (Muraenidae) occuring in Western Central Pacific. |
| 128 | Key to the species of subfamily Muraeninae occuring in the Western Central Pacific. |
| 129 | Key to the species of subfamily Uropterygiinae occuring in the Western Central Pacific. |
| 130 | Key to the genera of cutthroat eels (Synaphobranchidae) occuring in the Western Central Pacific. |
| 131 | Key to the genera of snake eels, worm eels (Ophichthidae) occuring in the Western Central Pacific. |
| 132 | Key to the genera and species of longneck eels (Derichthyidae) occuring in the Western Central Pacific. |
| 133 | Key to the genera and species of pike congers (Muraenesocidae) occuring in the Western Central Pacific. |
| 134 | Key to the genera of snipe eels (Nemichthyidae) occuring in the Western Central Pacific. |
| 135 | Key to the subfamilies and genera of conger eels (Congridae) occuring in the Western Central Pacific. |
| 136 | Key to the genera of duckbill eels (Nettastomatidae) occuring in the Western Central Pacific. |
| 137 | Key to the genera of sawtooth eels (Serrivomeridae) occuring in the Western Central Pacific. |
| 317 | Key to the species of Indo-Pacific Snake-eel (Genus Brachysomophis). |
| 903 | Key to species of spaghetti eels (Moringuidae) occurring in the Western Central Atlantic. |
| 904 | Key to species of false morays (Chlopsidae) occurring in the Western Central Atlantic. |
| 905 | Key to species of moray eels (Muraenidae) occurring in the Western Central Atlantic. |
| 906 | Key to species of cutthroat eels (Synaphobranchidae) occurring in the Western Central Atlantic. |
| 907 | Key to species of snake eels (shrimp eels, worm eels, and sand eels) (Ophichthidae) occurring in the Western Central Atlantic. |
| 908 | Key to species of longneck eels (Derichthyidae) occurring in the Western Central Atlantic. |
| 909 | Key to species of snipe eels (Nemichthyidae) occurring in the Western Central Atlantic. |
| 910 | Key to species of conger eels (Congridae) occurring in the Western Central Atlantic. |
| 911 | Key to species of duckbill eels (Nettastomatidae) occurring in the Western Central Atlantic. |
| 912 | Key to species of sawtooth eels (Serrivomeridae) occurring in the Western Central Atlantic. |
| 1077 | Key to Indo-Pacific garden eels (Congridae: Heterocongrinae). |
| 1232 | Key to the New Guinean species of Anguilla. |
| 1540 | Key to the genera of Dalophis of West Africa. |
| 1585 | Key to the species of Dalophis of Lower Guinea,West-Central Africa. |
| 1586 | Key to the genera of Ophichthidae of Lower Guinea, West-Central Africa. |
| 1710 | Key to the Anguilla species of southern Africa (Anguillidae). |