The ocean is deep. It’s made up of zones, or areas. Here are three of them.
Sunlight Zone
This zone gets heat from the sun. It gets light, too. Most ocean plants and animals live here. Phytoplankton are an important part of this zone. These tiny plants are the base of the food chain. They create oxygen for the planet.
Twilight Zone
This zone is cold and dim. It doesn’t get much light. Almost no plants grow here. Some of the animals in this zone are bioluminescent. They make their own light. Much of this zone is unexplored.
Midnight Zone
This zone is the largest part of the ocean. It’s very cold. No sunlight reaches it. The only light comes from animals that make their own. Water pressure is very high in this zone. This is an extreme environment. Many of its creatures are unknown.
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