| Family | Scientific Name | Author | Year | Common Name |
| Ophichthidae | Callechelys guineensis | (Osório) | 1893 | Shorttail Snake Eel |
All Callechelys Species: Tail tip a hard or fleshy finless point. Gill openings inferior, parallel or converging forward, isthmus narrower than gill opening length, unconstricted. Dorsal fin present, generally elevated, its origin on nape above supraoccipital. Pectoral fins absent; anal fin present. Median groove on underside of snout extends to and beyond anterior nostril bases. Vomerine and intermaxillary teeth present.
Callechelys guineensis
Unique Characteristics: Body elongate, its depth 1.7-2.2% total length; head 5.6-7.1% total length. Jaw teeth fewer, 4 or 5 on each maxilla, 9-11 on each mandible. Dorsal spots of large individuals not coalesced into saddles.
Similar Species:
Callechelys muraena, Blotched Snake Eel.
Blotched Snake Eel, Callechelys muraena. Body moderately elongate, its depth 2.6-3.7% total length; head 7.0-8.8% total length. Jaw teeth numerous, 7-11 on each maxilla, 11-17 on each mandible.
Callechelys springeri, Ridgefin Eel
Ridgefin Eel, Callechelys springeri. Body elongate, its depth 1.7-2.2% total length; head 5.6-7.1% total length. Jaw teeth fewer, 4 or 5 on each maxilla, 9-11 on each mandible. Dorsal spots of large individuals coalesced into dark saddles.
References:
McCosker, J.E. A revision of the Snake-eel genus Callechelys (Anguilliformes: Ophichthidae) with the description of two new Indo-Pacific species and a new callechelyin genus. Proceedings of the Califormia Academy of Sciences, 50(7):185-215, 14 figs., 1 pl, 4 tables.