How can a salmon swims upstream using newtons third law of motion?

A salmon swims upstream by using Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. As the salmon pushes against the water with its fins and body, the water exerts an equal force in the opposite direction. This allows the fish to propel itself upstream despite the current. The salmon's powerful muscles and streamlined shape further enhance its ability to navigate against the flow.