NetChicken,
I KNEW that you would pounce on that one...
Yes, dolphins are the hippie-friendly animal of our times, but I'm not some hippie who's high on 'ganja' right now...
Dolphins have large brains that are as large in relation to their bodies as ours are. Their 'clicks' also aren't composed of one, two, three, or
even twenty types of sounds...scientist who've studied them report finding a wide variety of distinct sounds that seem to be fashioned for whatever
particular occasion that they're in... that is, they don't just 'moo' the same way everytime they spot a human.
Cattle have small brains (in comparison to humans, dolphins, chimps...) in relation to their bodies, CANNOT learn 'tricks', and make sounds that
only have a few variations.
And, of course, dolphins aren't fish... nor should you want to eat them