I haven't fished the Canadian side in that area but they catch them at Chippewa Point and I've caught them just up river from there on the US side near the channel. LllI'm sure they are present throughout the river. As EsoxAC3 said lots of ways to catch them but finding them, controlling the boat in the current and fishing at night are all keys. I'd concentrate on 25-50 fow on shelfs along drop offs with current. Water around Grenadier isn't as deep and has less current than areas I tend to fish. I like to troll so I can cover more water and hit more spots to locate active fish. I generally am fishing close to the US shipping channel. Sent from my iPad using Lake Ontario United