150,000 (1992 CAPRO). Central Bwatiye speakers are ethnically Bata.
Adamawa State, Lamurde, Numan, Demsa, Gombi, and Guyuk LGAs; Kaduna State, northeast of Kaduna town; Kogi State, confluence of Benue and Niger rivers.
Central Bwatiye (Demsa, Demsa Bata), Mulyen (Mulwyin, Mwulyin), Opalo (Opolo), Wa-Duku. In Bata dialect subgroup. Bacama and Central Bwatiye [bcy] 54%–68% of non-riverine Bata [bta] dialects (Furo and Song); Upriver dialects have contact with downriver dialects due to fishing practices. Lexical similarity: Bacama [bcy] 89% with Central Bwatiye [bcy], 81% with Njoboliyo [bta], 86% with Furo [bta], 84% with Song Bata [bta].
Bacama fishermen migrate long distances down the Benue River with camps as far as the confluence. Bacama are joined with the Bata [bta] in the Bwatiye Association. Christian, Muslim.