Here's the video Karl took:
If this video doesn't load, you can find it here on YouTube, where Karl wrote:
While taking the 1:00PM ferry from Swartz Bay (Vancouver Island) to Tsawwassen (Vancouver BC) on July 25, 2015, they told us that a person was swimming through Active Pass (Between Galiano Island and Mayne Island) with a group of kayakers. They said something about his route, but I didn't hear it. Swimming around Mayne Island perhaps? If anyone knows the name of the swimmer and their route, please post it in the comments. The ferry was the Spirit of British Columbia. Filmed with a Canon HD CMOS digital camera.