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  • Whales and porpoises live their entire lives in salt water.
  • Manatees inhabit tidal zones; they can spend a lot of time in salt water, but they must find fresh water to drink.
  • Seals, sea lions and walruses are considered semi-aquatic. They are born on land and only spend part of their time in the water.
  • Sea otters can walk on land, but are usually born in the ocean and spend all their time there. Marine otters are a similar species; little is known of their behavior, but they do seem to spend more time on land than sea otters.
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14y ago

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