| Family | Scientific Name | Author | Year | Common Name |
| Eleotridae | Erotelis smaragdus | (Valenciennes) | 1837 | Emerald Sleeper |
Erotelis smaragdus
Unique Characters: Prominent, ventrally pointed spine on preopercle present, this spine may be difficult to see as it is often covered by skin. Scales cycloid and smooth, about 90 longitudinal rows;. Caudal fin extending anteriorly onto body. Body very slender, elongate, and terete, the depth contained 7-9 times in standard length.
Similar Species:
Fat Sleeper
Dormitator maculatus
Largescaled Spinycheek Sleeper Eleotris amblyopsis
Fat Sleeper Dormitator maculatus. Preopercular spine absent.
Largescaled Spinycheek Sleeper Eleotris amblyopsis. Prominent, ventrally pointed spine on preopercle present, this spine may be difficult to see as it is often covered by skin. Scales ctenoid and rough, 40-65 longitudinal rows. Caudal fin not extending anteriorly on body. Body depth moderate.
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