Dusky sleeper (Eleotris fusca)

Scientific name: Eleotris fusca Forster, 1801

The Dusky sleeper (Eleotris fusca) is a freshwater fish of the family Eleotridae. In the aquarium it needs water at 25°C (77°F). Native range: Indo-West Pacific, East Africa to French Polynesia.

Dusky sleeper care at a glance

Temperature: 25°C (77°F)

Biology

Dorsal spines (total): 7; Dorsal soft rays (total): 7-9; Anal spines: 1; Anal soft rays: 8. Diagnosis: (57)59-68 longitudinal line scales; preopercular spine present; (8)9-10 gillrakers on lower part of first branchial arch. Dark brown to black in color; horizontal lines on body; young with spotted fins.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name: Eleotris fusca
Family: Eleotridae (Sleepers)
Order: Perciformes (Perch-like fish)
Class: Actinopterygii (Ray-finned fishes)
Maximum length: 26.0
Environment: Marine; freshwater; brackish; demersal; amphidromous
Climate: Tropical
Distribution: Indo-West Pacific: East Africa to French Polynesia.
Conservation status (IUCN): Least Concern (LC)
Threat to humans: Harmless
Uses: Fisheries: minor commercial; aquarium: commercial
Resilience: Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)