Conservation ActionsThere are no known conservation actions in place for this species. It may already be extinct. Immediate priority should be on determining whether it is still extant.
Location InformationThe species is only known from the vicinity of Medan in Sumatra, Indonesia (Tan and Ng 2005). Specimens identified as Betta fusca, that were collected further south in Riau and Jambi provinces, may refer to Betta raja or some other species (H.H. Tan pers. comm. 2019).