One whale sings a song and the others that hear it pick it up, changing it slightly and sing it themselves and this passes around the community. No song every fully fades. Some note of it is preserved in the upcoming songs. They never restart. They just modify what has come before.
New whales add to it as they enter the pool of singers.
Songs that are sung in the Arctic have been found, traces of them that is, in the Antarctic. All whales of that species have some part of it in their song. It contains some of every whale's creative spirit and mind. It contains hidden in its notes the soul of the entire whale race, the ones living and the ones dead. In this way I think the Torah functions.