Often, a goby fish and a shrimp will live together in a burrow the shrimp has dug in the sand. The shrimp is almost blind and therefore is unable to see predators approaching when he is outside of the burrow. When the shrimp is in danger, the goby fish touches the shrimp with its tail to warn him. Then, both go back into their burrow for safety.

Mutualism

Explanation: Mutualism is a relationship between two species that both benefit from each other

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the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation: