Branchiostegus semifasciatus is a species of marine ray-finned fish, a tilefish belonging to the family Malacanthidae. It is from the Eastern Atlantic, from Casablanca, Morocco to Baia dos Tigres, Angola. They are spotted rarely north of Dakar, Senegal.Dooley, J.K., 1978. Systematics and biology of the tilefishes (Perciformes: Branchiostegidae and Malacanthidae) with descriptions of two new species. NOAA Tech. Rep. NMFS Circ. No. 411:1-78. This species reaches a length of .
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