Was there any Canadian submarines in World War 2?

Yes. the Royal Canadian Navy maintained a submarine arm in both world wars. interestingly Canadian subs were code-named after Indian Tribes. this can be taken without reservation- pun intended. It is understood they still are. The modern RCN has only conventional ( Diesel electric) submarine, not atomic ones. the RN ( British) has nuclear subs, as does France. the only allied countries having atomic subs other than the US are Britain and France. Sorry, Fair Italy does not have any atomic subs, but they have a neat conventional arm. an Italian built sub held the world depth record in a controlled plunge in the late forties. The Bathyscaphe-X went down l0,334 feet- this was way., way ahead of it"s time. Craft was crafted byNavalmeccanica in Italy.