The video shows a large fish swimming in a tank of water. The fish is moving its fins and tail, creating ripples and bubbles in the water. The fish is the only visible creature in the tank, and it appears to be healthy and active. The tank is well-lit, and the water is clear, allowing for a good view of the fish and its movements. The fish's scales are shiny and reflect the light, and its eyes are visible and alert. The fish seems to be exploring its environment, moving around the tank and occasionally coming close to the camera.