Enables L-iditol 2-dehydrogenase activity. Involved in flagellated sperm motility. Acts upstream of or within sorbitol metabolic process. Located in mitochondrion and motile cilium. Is expressed in several structures, including alimentary system; limb; liver; metanephros; and nervous system. Used to study cataract. Orthologous to human SORD (sorbitol dehydrogenase). [provided by Alliance of Genome Resources, Apr 2022]