Evolution of green hydra

From Anarchy In Action
Hydra viridissima2.jpg

Green hydras are freshwater tentacled creatures whose bodies are full of food-producing plants. The symbiotic evolution of the hydras and the plants (called Chlorella) have enabled the swimming aquatic animal to be able to photosynthesize like a plant.[1]

  1. Lynn Margulis, Symbiotic Planet: A New View of Evolution (Amherst: Science Masters, 1998), 10.