Orcas in Peterson Bay

We were over across Kachemak Bay a few weeks ago at a social gathering at someone's house over there, when suddenly a couple orcas surfaced. My husband got out his phone and nabbed a quick view of them, but by time folks gathered to see them, they'd dived and were out of sight. We caught a glimpse of their blows when we were heading back to Homer an hour later, but they didn't resurface like they did in this video. The bouy's are an oyster farm.