Enables cation channel activity. Involved in cellular response to light stimulus. Acts upstream of or within cellular protein localization; retinal rod cell development; and signal transduction. Located in new growing cell tip. Is expressed in foregut; reproductive system; and sensory organ. Human ortholog(s) of this gene implicated in congenital stationary night blindness and congenital stationary night blindness 1C. Orthologous to human TRPM1 (transient receptor potential cation channel subfamily M member 1). [provided by Alliance of Genome Resources, Apr 2022]