Where walrus are a problem, for example in the Kane Basin off Ellesmere Island, the custom is to take a shotgun, load one round as a banger to scare it off and one live round in case it doesn't work. Same for polar bear because it's much better and (less complicated) to scare them off. You have to be properly licensed up here to carry any firearm. But in some places it really is essential equipment. In most parks even with grizzlies no guns allowed, but nothing dangerous in the water, except rapids, rocks,sweepers, ice, waves...I've a loaded shotgun for a lot of things, but this is the 1st I've heard of walrus ... thanks for the warning if I'm ever in their proximity.