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Dolphins are mammals- so they have lungs, and breathe air through a 'blowhole' on top of their head. They do not have gills like the fishes.
Wiki User
∙ 12y ago
Wiki User
∙ 6y agoBeing mammals - they lack the swim bladder that fish have. They simply use their tails to 'steer' themselves down or up.
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What will rise and what will sink?
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Fastpitch
What the opposite of sink?
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