Black Cod are another popular cod, although, it is not a true cod. The big fish are usually found offshore in very deep water. We are talking depths of up to 600 feet. If you want to target a fish around 4 feet long and over 40 pounds, you’re going to want to go deep. A lot of the smaller fish that anglers target and enjoy eating will be found shallower. They eat a variety of crustaceans and fish. They are a very popular food fish.