I was not sure but starting around 15:28 I was still seeing what I thought was the same group of Gervais whales. But in looking at the detailed pictures later on, I found that this was an entirely new group of 4 Gervais beaked whales. In the same area about the same time. As I said before, this just does not happen ! They had the same behavoir of swimming around and close to my boat, with a series of shallows dives near me. They are my favorite beaked whales !