That definitely looks like a structure dive. But I'm amazed at the quality of the wide-angle shots of your buddy. The water must have been pretty darned clear!
Saanich Inlet is a lot like Hood Canal. You don't have as much "fish 'n weeds" but there is some interesting stuff. That particular dive the bottom drops off to 60+ meters a mere 20m from the shore. There is a sudden wall then it gets dark.