Sakana is perhaps best known for its Happy Hour pricing, which I believe to be in play a couple of times each day (once in the late afternoon, and again late-night). This promotion is highlighted by their "sushi love boat", which drops in price from around $35 to around $23, and is truly one of the best sushi deals going in Calgary (or anywhere, for that matter). The boat contains a good assortment of quality nigiri, maki, and sashimi, and feeds three comfortably.
It's not quite 5* sushi quality, but it's very good, and dollar-for-dollar it would be hard to do better (at least during Happy Hour).