Dolphins

Dolphins: Second most intelligent life-form to have inhabited Earth. Most intelligent of Earths indiginous species. Subordinate only to a race of Hyperintelligent pan-dimensional beings know commmonly as mice. Man has always assumed that he is more intelligent than dolphins because he has accomplished so much: the wheel, New York, Wars, and so on, while all the dolphins ever did was muck about in the water having a good time. However, dolphins consider themselves far more intelligent than man for exactly the same reasons. The latter is true. Curiously enough, the dolphins had long known of the impending destruction of the planet Earth and had made many attempts to alert mankind to the danger; but most of their communications were misinterpreted as amusing attempts to punch footballs or whistle for titbits, so they eventually gave up and left the Earth by their own means shortly before the vogons arrived. The last ever dolphin message was misinterpreted as a surprising sophisticated attempt to do a double-backwards-somersault through a hoop whilst whistling the 'Star Spangled Banner', but in fact the message was this: So long and thanks for all the fish. The current whereabouts of the dolphins are unknown.