Can You Swim in Zero Gravity?

There is no “up” or “down” in zero gravity. In fact, if you're swimming (literally) while in space, there's not even a “sideways” or “crooked.” There's no gravity for the fish to orient itself. So NASA took live fish up to space and let them swim around in zero gravity.

Can you swim in the air in zero gravity?

There is no force removing the air bubbles and water droplets like we are used to when swimming on Earth. If two droplets hit themselves at low speed they may unite, but for larger speed the result will be even more droplets in air. So I think swimming in zero gravity is not possible.

Can you move in zero gravity?

If you are stationary in space with nothing around you to push off on, you cannot move yourself by pushing on yourself. But you can twist your body around its center of gravity - you just can't move your center of gravity. On Earth, we can walk forward because we push on the Earth and it pushes back on us.