| Family | Scientific Name | Author | Year | Common Name |
| Congridae | Xenomystax bidentatus | (Reid) | 1940 | Rabbit Conger |
Xenomystax bidentatus
Unique Characters: Body moderately elongate. Mouth horizontal or slightly oblique. Snout length only slightly less than, to somewhat greater than diameter of eye. Anterior nostrils free; posterior nostril at or above mideye level. Pectoral fin well developed. Dorsal fin begins over or slightly behind base of pectoral fin. Caudal fin present though sometimes reduced. Preanal length usually less than 40% total length. Dorsal- and anal-fin rays segmented. Flange on upper lip present or absent. Inner row of maxillary and mandibular teeth separated from outer rows by an edentulous groove, maxillary and mandibular teeth exposed when mouth closed. Intermaxillary tooth patch longer than broad. Stomach and intestine pale.
Similar Species: Bristletooth Conger,Xenomystax congroides. Body moderately elongate. Mouth horizontal or slightly oblique. Snout length only slightly less than, to somewhat greater than diameter of eye. Anterior nostrils free; posterior nostril at or above mideye level. Pectoral fin well developed. Dorsal fin begins before base of pectoral fin. Caudal fin present though sometimes reduced. Preanal length usually less than 40% total length. Dorsal- and anal-fin rays segmented. Flange on upper lip present or absent. Inner row of maxillary and mandibular teeth separated from outer rows by an edentulous groove, maxillary and mandibular teeth exposed when mouth closed. Intermaxillary tooth patch as broad as long. Stomach and intestine black.
Source: SEFSC Pascagoula Laboratory; Collection of Brandi Noble, NOAA/NMFS/SEFSC