This video captures a scuba diver underwater, swimming alongside a sea turtle. The diver is wearing a black wetsuit and a yellow oxygen tank, while the turtle has a greenish-brown shell with a pattern of lines and dots. The water is a clear blue, and bubbles are visible around the diver, indicating movement. The turtle swims gracefully, its flippers propelling it through the water. The video provides a close-up view of the turtle's shell and head, showcasing its textured skin and calm demeanor.