Creatures of the Deep: Sunlight Zone

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The sunlight zone makes up only 2–3% of the ocean, but it's home to a massive amount of life. It's also the zone we know the most about, and the one we can see when we're boating, swimming, snorkeling, and even scuba diving. It goes from the surface of the ocean down to 200 meters.

It gets the most visible light, and also heat from the sun. The sunlight that penetrates this layer allows for photosynthesis, so it's the only layer where phytoplankton—a key part of the food web—can grow. Other species that live in the sunlight zone include fish, shallow corals, sea turtles, dolphins, whales, sharks, and plants.

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