What are the differences between the photosynthetic abilities of various species of photosynthetic animals?

Photosynthetic animals can vary in their abilities to carry out photosynthesis. Some photosynthetic animals can produce their own food through photosynthesis and survive in environments with little to no access to external food sources. Other photosynthetic animals may only be able to supplement their diets with photosynthetic products. One major difference in the photosynthetic abilities of different species of photosynthetic animals is the type of pigments they use for photosynthesis. Some species may use chlorophyll a, while others use a combination o....