The video shows a large turtle swimming underwater. The turtle is moving slowly and gracefully through the water, surrounded by green plants and algae. The water is murky, but the turtle is clearly visible. The turtle's shell is a dark brown color, and its skin is a lighter shade of brown. The turtle's flippers are moving in a steady rhythm, propelling it through the water. The plants and algae sway gently in the current, creating a peaceful underwater scene.