Transcription: Dolphins are highly intelligent animals and live in every ocean and in some tropical rivers. They have a highly developed social conscience and will help wounded comrades. For example, if a dolphin were injured by the propeller of a ship and sank to the bottom of the sea, it would drown if it failed to get back to the surface within the space of a few minutes to breathe in air. Other dolphins will carry a wounded dolphin to the surface.
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