Enables temperature-gated cation channel activity. Involved in heat acclimation. Located in non-motile cilium and plasma membrane. Expressed in several structures, including SMDVL; body ganglion; head neurons; lumbar neurons; and uterus. Human ortholog(s) of this gene implicated in several diseases, including keratosis (multiple); motor neuron disease (multiple); and osteochondrodysplasia (multiple). Is an ortholog of human TRPV5 (transient receptor potential cation channel subfamily V member 5).