What could they be trying to tell us?

Sheena Harvey via Discover Wildlife:

‘“Humpback whales live in complex societies, are acoustically diverse, use bubble tools and assist other species being harassed by predators,” says co-lead author Dr Fred Sharpe. “Now, akin to a candidate signal, we show they are blowing bubble rings in our direction in an apparent attempt to playfully interact, observe our response, and/or engage in some form of communication.”…’