Humpback whale songs are passed down over generations.
This language evolves in a similar fashion to the verbally transmitted tribal lore of Australian Aboriginal Culture from where the term Songlines is derived.

The East Australian Humpback Whales travel in an unending cycle of migration between their birthplace in the inter-reef lagoon of the Great Barrier Reef and their Antarctic feeding areas.
Songs emitted by the Humpback Whales can be heard over great distances. Each year the whales sing a new song. Haunting melodies of radiant joy which fill the ocean along the East Coast of Australia. This video is from The Oceania Project:
When ecosystems across the planet are collapsing and species are becoming extinct at an accelerating rate, the East Australian Humpback Whales are making a remarkable recovery. They have become Australia’s national treasure and a symbol of hope for the imperilled environment.