what specialized structure does a euglena have that allows it to detect light so it can eat?
Euglena use an eyespot to detect light. An eyespot is a dark spot on their body. They cannot see the world around them but they can see light. The eyespot is located anywhere â¦ on their body but usually near their flagella. A flagella is a whip-like strand that euglena and other organisms use to move through the water. Euglena are producers and they make food through photosynthesis so they need the light. 6 people found this useful.