The video shows a close-up of a sea creature, possibly a sea snake, swimming in the water. The creature is slender and has a long body, with a pattern of dark spots along its sides. It moves gracefully through the water, surrounded by various types of seaweed and other marine plants. The water is clear, and the sunlight filters through, casting a dappled light on the scene. The creature's movements are smooth and deliberate, as it navigates through the underwater landscape.