The amount of a retinaldehyde dehydrogenase 3 (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes id OBA_2057904 (level of retinaldehyde dehydrogenase 3 (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid retinaldehyde dehydrogenase 3 (human) amount.