Green Hydra are found in shallow water, where they attach themselves to plants, stones, twigs, or other objects. Their prey includes aquatic insects, crustaceans (such as water fleas and scuds), flatworms, aquatic worms, fish fry, and other small creatures in the water. They also eat a certain type of algae, called Chlorella, which gives the hydras their green pigment as the Chlorella continue to live inside the hydra. (Magnification is 6x at 35mm)