I never watched that series, but the theme was played in my old Amstrad CPC in the videogame by John Ritman & Bernie Drummond.
Link - via Boing Boing
Gordon Bauer, associate professor of psychology at the New College of Florida who did not work on the studies, says, "This is the first report, to my knowledge, of a nonhuman mammal's ability to discriminate rhythmic patterns."
But Bauer doubts that dolphins realize they are producing what people consider 'music'.
Link - via Boing Boing
They also recognize themselves on a mirror and that's a cognitive condition only reached by superior primates such as orangutans and humans... And also by smart elephants
http://www.pnas.org/cgi/content/abstract/0608062103v1