The video shows a close-up of a fish swimming in a tank. The fish is large and has a patterned body with stripes and spots. The water in the tank is clear, and the fish is swimming around the tank, occasionally coming up to the surface. The fish's fins are moving rapidly, creating ripples in the water. The tank appears to be well-maintained, with no visible debris or algae. The lighting in the tank highlights the fish's colors and patterns, making them stand out against the greenish background of the tank.