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An overview of the five distinct photic layers of the ocean, also known as ocean zones. Each zone has unique characteristics in terms of light, pressure, temperature, and the types of organisms that inhabit them. Fun facts about each zone and an activity to test your knowledge of sea creatures and their habitats.
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Fun facts about each zone: The sunlight zone has lots of light and oxygen and low pressure. The majority of ocean life exists in this zone, and many human activities such as boating, fishing, and watersports take place here. The twilight zone contains some interesting sea creatures such as eels and swordfish. This layer is penetrated by a few rays of light. The midnight zone contains no light and has very cold temperatures and high pressure. Organisms in this zone (and the abyssal zone) are bioluminescent, and many do not have sight. The abyss contains extremely high pressure and freezing temperatures. Very little life can survive in this zone. The trenches are the final zone, this is one of the most mysterious and hostile environments on the planet. Organisms here eat debris that float down from the upper layers.
ANSWER KEY: Sunlight Zone: Shark, Sea Turtle, Dolphin Twilight Zone: Krill Midnight Zone: Sperm Whale, Squid, Deep-Sea Angler Fish The Abyss: Sea Spider, Basket Star The Trenches: Tube Worms, Sea Cucumber