Thanks guys for the kind comments. We were lucky to have several whales perform for us for hours at a time. We didn't know why they were breaching, but we enjoyed them doing it, and I came to think they were just having fun.
Yes, we were in a boat. Five of us chartered a boat for 10 days. There are quite a number of humpback whales in Frederick Sound during the summer months. We would see small groups of whales feeding on krill; these were the whales that would also breach. We also saw groups of up to 15 whales cooperatively feeding for herring using bubblenets. The whales blow a net of bubbles around the herring, concentrating them into a tight group, then the whales surge up through the ball of herring with their mouths agape, taking in tons of herring. These groups are matriarchal in nature, with the matriarch (mother) being in the center of the group, and her offerspring around her.