motion toward or veering away from a light source. Positive is type motion toward light- negative type is motion veered away from light. Some insects show a union between light orientation and muscular activity.

PHOTOTAXIS: "The positive phototaxis between the fish and the artificial light source was not expected."
Cite this page: N., Pam M.S., "PHOTOTAXIS," in, April 7, 2013, (accessed September 25, 2020).