I'm no expert but I've heard any aerobic exercise that bends (not breaks) your will helps lose weight - especially combined with healthy eating. Swimming is indeed aerobic if you go for speed and has the benefit over running of no joint impact
Each and every sport helps you reduce weight,except the indoor ones
Swimming burns a lot of calories so yes, it will help you lose weight.
It burns calories, so yes it will help you lose weight. As i remember right it isnt really effective as a fat burner. Since a relatively low amount of the energy you use cames from your fat cells. But its been to long since i read on the subject to know any specific numbers.
Swimming is an excellent aerobic exercise and although you will burn calories you will not burn much fat. If you look at the elite swimmers they are in fantastic shape but not necessarily muscular. Because fat floats better than muscle(which is heavier and sinks - which is why hydrostatic weighing is an excellent way to determine % body fat) the more time and training you do in the pool the more your body will adapt and store fat to keep you a float. Pool exercises are great but you should also focus on land based weight training as well to increase muscle mass if that is what you are looking for.