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Ocean mammals are marine animals that are warm-blooded and have adapted to life in the water. They breathe air through blowholes located on the top of their heads and give birth to live young. These mammals have streamlined bodies for efficient swimming and are equipped with flippers or fins to help them navigate through the water. Some common examples of ocean mammals include whales, dolphins, seals, and sea otters. These creatures play important roles in the marine ecosystem and are fascinating to observe in their natural habitats.