The video shows a group of fish swimming in a tank. The fish are of different colors and sizes, and they are swimming around in the water. Some of the fish are orange, while others are brown and black. The tank is filled with water and there are plants and rocks visible in the background. The fish are swimming around each other, and some are swimming near the surface of the water while others are swimming near the bottom of the tank. The video captures the movement of the fish as they swim around the tank, and the viewer can see the details of the fish, such as their fins and tails.