Dolphins. Rather than being gay sharks, they are in fact the second most intelligent species on planet Earth.

"The second most intelligent creatures were of course dolphins who, curiously enough, had long known of the impending destruction of the planet earth. They 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 decided they would leave earth by their own means. The last ever dolphin message was misinterpreted as a surprisingly sophisticated attempt to do a double backward somersault through a hoop while whistling the star-spangled banner, but in fact the message was this: So long and thanks for all the fish."

Love it!