Enables zinc ion transmembrane transporter activity. Acts upstream of or within several processes, including T cell homeostasis; chordate embryonic development; and zinc ion transport. Predicted to be integral component of membrane. Predicted to be active in plasma membrane. Is expressed in several structures, including gonad; nervous system; sensory organ; spleen; and yolk sac. Orthologous to human SLC39A3 (solute carrier family 39 member 3). [provided by Alliance of Genome Resources, Apr 2022]