Biotoecus opercularis (Steindachner, 1875)
photo by Bornstein, A.

Family:  Cichlidae (Cichlids), subfamily: Geophaginae
Max. size:  10 cm TL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  South America: Amazon River basin, in the Branco River, the middle and lower Negro River, Urubu River, Lake Saracá, Parintins, Lake Carauaçu, lower Trombetas River.
Diagnosis:   
Biology:  Inhabits rivers (Ref. 12251).
IUCN Red List Status: Least Concern (LC); Date assessed: 07 November 2018 Ref. (130435)
Threat to humans:  harmless


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