Whale song
The long call of a whale heard underwater — communication across distances that the air would not carry.
A whale song in a dream is the dream's image of communication carried across distances the air would not carry. The whales sing for hundreds of miles; the water is the medium that makes the long call possible. The dream brings the song when something in your life — a piece of grief, a love kept across years, a private language between two people — is travelling through a medium that ordinary speech could not cross. A whale song heard clearly and answered is the dream affirming that the long signal is reaching another singer. A whale song that has stopped, with the ocean now empty of the long call you used to hear at this depth, is the dream noting that the singer has gone silent, and the channel that depended on the voice is no longer carrying anything.