How do you describe someone under water?

Someone underwater might appear weightless, with their limbs gently floating and moving in a fluid, graceful manner. Light refracts through the water, creating shimmering patterns on their skin and hair, while bubbles might escape from their mouth or nose, adding a sense of tranquility. Their expression could be serene or focused, depending on whether they're swimming, exploring, or simply enjoying the moment. Overall, the scene captures a sense of calmness and a unique beauty found beneath the surface.