Apparently, Beluga whales (that look a lot like dolphins) like this one from China are smarter than other whales and have soft tissue around their mouths. Both traits are conducive to swirling paint on paper with a brush.
Whale/artist Xiao Qiang’s trainer Zhang Yong says:
His favourite colour seems to be blue and he’s best of all at seascapes. His people always look like seals… He loves to play jokes on his keepers. Sometimes he deliberately paints them instead of the paper.
Xiao Qiang sounds fun.
Cheer up, art school kids. Go read this guide to not starving.