Linked from
The 11 pages that link to Phototaxis, each with the reason it gives.
ChemotaxisCompared with: It uses light, rather than a chemical gradient, as the directional cue.
ZoosporeRelated: Light can orient the swimming of zoospores in photosynthetic organisms.
EuglenaRelated: Euglena cells swim toward suitable light, helping position them for photosynthesis.
ChlamydomonasRelated: Chlamydomonas swims toward or away from light depending on conditions.
Simple eyeRelated: Simple eyes can guide movement toward or away from light.
HeterocongrinaeRelated: Light and shadow can affect whether garden eels emerge from their burrows.