phototaxis

Phototaxis is a biological response where an organism moves in relation to a light stimulus. This movement can be towards the light (positive phototaxis) or away from it (negative phototaxis). It's a type of taxis, which are oriented movements of motile organisms in response to a stimulus.12

This behavior is crucial for many organisms, influencing their daily activities and survival. For instance, some organisms use phototaxis to find food, avoid predators, or locate suitable environments for reproduction. The ability to detect and respond to light is mediated by specialized cells called photoreceptors, which contain light-sensitive pigments like rhodopsin. The complexity of phototactic responses varies greatly across different species, from simple light detection in flatworms to sophisticated vision in humans.234