http://www.digitaljournal.com/article/51881

Dolphins sing 'Batman' theme

Posted Nov 14, 2006 by KeithLDick

http://www.abc.net.au/science/news/stories/s1473208.htm

Yep they are probably smarter than us... Tho I doubt they could sing "Wipe Out"...
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"The dolphin was reinforced for producing a specific rhythm to a specific object," says Harley.
"For example, when we presented him with a Batman doll, he received a fish for producing a specific rhythm, in this case, a short sound and then a long one."