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Related Articles: Gobioids, Freshwater to Brackish Gobioids,

/The Conscientious Aquarist

Sleeper Gobies, the Family Eleotridae, Freshwater, Brackish & Marine


By Bob Fenner

Who you calling a Duckbill?


Suborder Gobioidei; Eight families, about 268 genera, 2100 species (many more to be described). A listing here just of families with fresh to brackish water members.

Family Eleotridae , Sleepers. Marine, fresh and brackish water species. Have separated pelvic fins (no sucking disc). Mouths never sub-terminal. To two feet in length! Approximately 35 genera, 150 species.

Butis butis (Hamilton, 1822) , the Duckbill Sleeper. Freshwater; brackish; marine; pH range: 7.0 - 8.0; dH range: 9 - 19. To six inches.  Indo-West Pacific: East Africa to Fiji http://fishbase.org/Summary/speciesSummary.php?ID=8035&genusname=Butis&speciesname=butis

Dormitator maculatus (Bloch 1792), the Fat Sleeper. Found in the Americas, from North Carolina to Southeastern Brazil. Marshes to brackish pools. To more than two feet overall length in the wild. Predatory; best kept with aggressive fishes. Temp. 22-24 C. Aquarium image.  

Hypseleotris compressa (Krefft 1864), the Empire Gudgeon. Australia and South-central New Guinea. To four inches in length. In the wild feeds on larval insects, small crustaceans. Shown: one inch aquarium specimen.

Oxyeleotris lineolatus (Steindachner 1867), the Sleepy Cod. Oceania; Australia and central-south New Guinea. To sixteen inches in length. Temp. 20-28 C. Eats insects, crustaceans, fishes in the wild... most everything, everyone in captivity.

Oxyeleotris marmorata (Bleeker 1852), the Marbled Goby. To two feet in length. Asia; Thailand, Indonesia. Cond.s: freshwater to brackish, pH 6.5-7.5, dH 10-15, temp. 22-28 C. A swallower of many smaller aquarium fishes by night.

Tateurndina ocellicauda Nichols 1955, the Peacock Gudgeon. To 7.5 cm. Oceania: eastern PNG. Freshwater, neutral pH, soft water desireable. http://fishbase.org/Summary/species Summary.php?ID=15907&genusname=

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