Create a photorealistic image of a Water elemental in a serene, aquatic setting. The Water elemental should be a fluid, humanoid figure composed entirely of crystal-clear water, with flowing currents and droplets forming its body. Its eyes should shimmer with an oceanic blue, exuding calm and depth. The environment should be an underwater seascape with vibrant coral reefs, schools of fish, and rays of sunlight piercing through the water from the surface. The scene should be ultra-detailed, capturing the fluidity and transparency of the elemental and the rich biodiversity of the marine life around it. The overall atmosphere should convey the fluidity, adaptability, and life-giving essence of the water element, evoking a sense of tranquility and wonder.