Marine organisms that drift with the currents are called..

Plants and animals living on the seafloor are called...

Animals such as crabs, snails, and sponges...

Range from algae to organisms as large as jellyfish

Animals such as sharks, whales, and flounder...

A rigid wave resistant structure built by corals is called...

Carbon dioxide and water changed to sugar and oxygen in the presence of sunlight is called...

Sulfur and nitrogen compouds used as an energy source to produce food is called...

An area where the mouth of a river opens up into an ocean

What happens at a mid ocean ridge?

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