I remember watching a nature TV show as a kid in which the presenter waxed lyrical about the way a group of dolphins took one dolphin's vocalization and repeate

I remember watching a nature TV show as a kid in which the presenter waxed lyrical about the way a group of dolphins took one dolphin's vocalization and repeated it and riffed on it, claiming that they were improvising musically together like a jazz group. I remember thinking that it was a very optimistic assumption, and it was just as likely that the rest of the dolphin were mocking and bullying the first dolphin. That train of thought probably says something about what I was going through at the time, but given other things we've learned about dolphins, I wouldn't discount my idea.