The video shows a person's hand holding a small black object, which is being placed into a fish tank. The fish tank is filled with water and has various colorful corals and fish swimming around. The person's hand is visible in the foreground, while the fish tank is in the background. The person's hand moves slowly and carefully as they place the object into the tank. The fish tank is well-lit, and the colors of the corals and fish are vibrant and varied. The water in the tank is clear, and the fish are swimming actively.