Where is the "rescue" part of it? Maybe a bit of anthropomorphism going on? Are we to believe that his buddies showed up to rescue Charlie? "We got your back, bro." Or maybe his buddies were using diversionary tactics? Maybe there were feints and flanks that I couldn't see?
The sea lions that showed up seemed to hug the shoreline, a common tactic when Orca are in the area. If they threw one a life ring, I missed it. Not that there can't be altruistic sea lions, but I'd need to see some evidence.
Mark