Affinities: Brienomyrus longianalis. Occurs in most coastal basins in West Africa . Within this species complex, four distinct waveforms of electric organ discharge (EOD) were noted in the Gabon (Ivindo River) populations, probably pointing to separate species . Exhibits sexual dimorphism in its EOD waveform and duration. EOD has a constant waveform and variable sequence of pulse intervals (SPI) .
Dorsal spines (total): 0; Dorsal soft rays (total): 14 - 19; Anal spines: 0; Anal soft rays: 25 - 31. Dorsal base 0.41-0.68 x anal fin base. Pectorals as long as head, posterior end does not extend origin of pelvic fins. Caudal peduncle thin, height 14.4-22.9x of SL. Dark grey-black or brown coloration.: fusiform / normal; Cross section: compressed.
Behavioural data for Brienomyrus Brachyistius is currently being reviewed.
Freshwater; brackish; benthopelagic. Tropical; 25°C - 28°C
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 296 records indexed .
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