The video shows a sea turtle swimming in a large aquarium tank. The turtle is gracefully gliding through the water, with its flippers moving in a slow and steady manner. The tank is filled with clear blue water, and the turtle's shell is a mix of brown and green colors. The turtle's head is visible, and it appears to be looking around its environment. The aquarium is well-lit, and the background is blurred, focusing the viewer's attention on the turtle.