Enables retinoic acid 4-hydroxylase activity. Involved in several processes, including response to retinoic acid; response to vitamin A; and retinoic acid catabolic process. Predicted to be located in cytoplasm. Orthologous to human CYP26B1 (cytochrome P450 family 26 subfamily B member 1). [provided by Alliance of Genome Resources, Apr 2022]