*Information from: BiologyWise: Volvox Facts; https://biologywise.com/volvox-facts
Volvox is a freshwater algae which is found in ponds, ditches and even in shallow puddles. Volvox is nothing but a green algae which exists as a grand spherical colony. Each little algae within the colony holds two flagella, or whip-like hair. The flagella act like tails and help them move through the water. It is interesting to watch the spinning movement of volvox under water. They move fast and protect themselves from the enemies (rotifers). The algae are connected to each other by thin strands of cytoplasm which help the whole colony to swim in an organized manner. Every algae has a small red eye-spot which enables the algae to detect light and helps swim towards light.*
As a photoautotroph, the Volvox makes it's own food through photosynthesis.