Enables anion:anion antiporter activity and bicarbonate transmembrane transporter activity. Acts upstream of or within bicarbonate transport; chloride transport; and regulation of pH. Located in apical plasma membrane. Is expressed in several structures, including adrenal gland; nervous system; respiratory system; and sensory organ. Orthologous to human SLC26A9 (solute carrier family 26 member 9). [provided by Alliance of Genome Resources, Apr 2022]