The sea slug, Elysia chlorotica, is able to become plant-like and survive solely on photosynthesis, which is highly unusual for an animal, by ingesting millions of green-colored plastids, which are like tiny solar panels, from algae. This suggests isolated plastids may be harnessed to create energy.

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The sea slug, Elysia chlorotica, is able to become plant-like and survive solely on photosynthesis, which is highly unusual for an animal, by ingesting millions of green-colored plastids, which are like tiny solar panels, from algae. This suggests isolated plastids may be harnessed to create energy.