How did the Sumerians go fishing

Indeed the Sumerians caught many fish and hunted fowl and gazelle. The Sumerians ate what they could. They ate apples, pears, grapes, figs, quinces, plums, apricots, mulberries, melons and pomegranates. Bread was a large part of the Sumerians’ meals. They drank beer, cow’s milk and of course water.They also ate food from what they grew – they grew barley, chickpeas, lentils, wheat, dates, onions, garlic, lettuce, leeks and mustard. The people gathered in the channels teeming with fish. That was a source of protein.