This is the intro to the Hitchhikers' guide to Galaxy. The movie based on the book. On the planet Earth, there are three intelligent races. The Least smartest are the humans, then the Dolphins, and the smartest being the mice. Yes, mice.
Well, the Dolphins tried to give the humans a final warning of their impending doom, but the dolphin signs were mistaken for water tricks, think Seaworld. The clip above is their final warning in a form of a song, So long and thanks for all the fish. Listen closely to the words, because they are pretty funny.