Enables cobalt ion transmembrane transporter activity; ferrous iron transmembrane transporter activity; and magnesium ion transmembrane transporter activity. Acts upstream of or within metal ion transport. Located in Golgi apparatus; early endosome; and plasma membrane. Is expressed in several structures, including alimentary system; axial musculature; central nervous system; ganglia; and sensory organ. Orthologous to human MMGT1 (membrane magnesium transporter 1). [provided by Alliance of Genome Resources, Apr 2022]